關於一個英文句子問題。?

1. 我是認為
(A) I'm not having much luck finding a job.
(B) I'm not having much luck in finding a job.
(C) I'm not having much luck with finding a job.
都是好英語而且常常被用到.它們之間的差別應該是:
(A)的"finding a job"應該是副詞用來形容整句.
(B)(C)"in/with finding a job"應該是形容詞用來形容luck.

2. 其他的例子有:
(D) He saved money in building the house himself.
(E) He saved money building the house himself.
(F) He saved in building the house himself.
(G) He saved building the house himself.
(H) He saved by building the house himself.

文法上, in或with, 像Dustin點出的, 都可以, 都有這樣的用法. 

口語上, 沒有介詞的說法比較常聽到. 

英文luck用法: 
collocation-
luck + with + [noun phrase] or [gerund phrase]
~ I'm not having much luck "with" finding a job. (O)    (with = 與...有關)
譯:  我現在沒有多大運氣能找到工作.
   I don't have much luck with finding a job. 我(一向)沒有多大找到工作的運氣.
~ I'm not having much luck "in" finding a job. (X)
  (不可以解為 "正當…", 意思含糊)
~ I'm not having much luck finding a job. (X)
   (不能用 participle construction, 語意不合.)
==>  在找工作期間,我冇運行?   因為找工作,令我冇運行?
        我想, 除了迷信的人不會這樣表達吧!

participle construction examples:
1. I am having fun answering your question.   (解為 "正當…" 或者 "因為..." 都可以)
~ I am having fun "in" answering your question.
(I am having fun while answering your question.)
(As a result of answering your question, I am having fun.)
2, I spent a lot of time preparing my exam.    (解為 "目的是...")  可以用 "in"
~ I spent a lot of time "in" preparing my exam.
(In order to prepare my exam, I spent a lot of time.)