Ok I have an important question.I am not an electrician but I have one question.Please read below.I need a breaker box outside more voltage?

You may have jumped the gun a bit and wasted money already.. first you need to find out if you can even have your little house on the property with or without a building permit. Next with he ctual question.. when power comes off the mainline that's a service line.. most actual homes it varies but usually it's about 100A-200A service. Older homes and mobile homes may not even have a 100A service. You can't just increase amp service without upgrading the wires to the breaker box and also at least the breaker in the box and if you have an interior box also the wiring to that box. You can split power between he would but you are splitting the power from one source. You can eliminate a lot of strain by using gas stoves and dryers. These mobile homes usually have just enough amperage to run a small dryer and oven and and few lights even then that's pushing it. So another unit with all the electric appliances may not work all hat great. SAve up a few grand and hire an electrician

you dont. you get the building permits for the building itself.. then you can get an electrician in to pull the permits and have him do the work.

Paremy, you can't and shouldn't do that. The electrical hook-up to your mom's place is set just for that place, all the way to the pole. You can't make it bigger just by changing the box, without risking damage or a fire. Don't spend another dollar on this without an electrician to help. You and mom may be better off to get a bigger mobile home, or trailer. Sorry, but that's the truth.

First, be aware that most cities and counties require building and/or remodeling permits for anything over 10'x10' permanent structure and any electrical work must be completed by a licenced electrician and inspected.
Second, without knowing what type and age of wiring is preexisting Noone can give you the correct answer to your question of what breaker panel you would be able to upgrade to.
Third, any work on the main electrical access from the pole to the house must be done by the electric company as they need to disable the power to the property from the junction box outside the property.

Amperage is the measure of capacity, not voltage. Wire that is too small can cause voltage loss only when the amperage demand isn't matched to wire size

Most mobile homes require an accessible electrical disconnect remote from the home itself, it's likely you are able to add a 30 or 60 amp two pole breaker to it and feed from that pedestal without upgrading the service.

But I do think you are over your head on this one. At very least you need to get an electrician to install the breaker at the service disconnect, mount the panel in the shed, and make the connections in both panels.

Ignoring the fact that you probably need some sort of permit just to set up your new home, and that you probably won't get insurance for it, my take is that if you tell nobody, and insulate your home really well, you could use an extension lead and have basic facilities like light and power for small appliances only.
No electric cooker or AC unit - maybe a small electric heater. . If you don't have much money and you live in a place that gets really cold in the winter, I just don't think that you can do it on the cheap unless you are prepared to live really frugally and dress warm. A typical American home, even a small one, needs its own electric supply to deliver 100 amps or more. If you don't use a properly trained electrician, setting this up is highly risky and probably illegal.

this is a question for a qualified electrician and not for a do it yourself home remodeler.

i'm pretty much a do it yourself sort and i would not attempt this. working on the 220v that goes into the main breaker box is NOT for amateurs. 220v is deadly if done wrong.

PS: imho, you need a minimum of 100 watts for even the smallest dwelling. Each of a stove and water heater wants 40 to 50 and that has to be a 220v supply. The refrigerator wants 20 watts at 110v by itself. The rest of the kitchen needs at least 20 watts, perhaps 30, and on a 220v supply. Add them up and allow only a small amount of overlap -- you're probably over 100 watts already.

plus the current supply for the existing house and you're likely well over the present rating for the main breaker box.

which means time to call an electrician.

btw, you have to get proper permits to do this whole thing -- failing to do so can result in a surprise order to pull down the entire offending structure immediately

Take out some fire insurance in the process.

you dont......... you get the building permits for the building itself.................. then you can get an electrician in to pull the permits and have him do the work.........

Breaker box sizes are chosen for the size of the building which is going to use the electric. You need to consult the Power company about what needs to be done. Or, if you know someone who has the same situation, talk with them about resolving this.

you wont find a big enough breaker box for all that has to be run to it. you just cant have a lead for light etc, the cable must be the right gauge and has to go underground and wrapped in waterproof tape

I friend of mine got an electrician from kaodim.sg. he says they did good! Maybe they could help :)