为了……，……

Both spots are correct, but they throw different light on the goal. Fronted 为了钱，他什么都干 puts the motive on a pedestal, like a movie narrator setting the scene. The version 他为了钱什么都干 just states the fact without drama. English 'in order to' has one fixed slot, so learners assume Chinese does too. It doesn't. What never works is dumping 为了 after the action. That slot belongs to 是为了, which is a different setup altogether.

Think of 为了 as the words 'and the reason for all this is...'. You open the door, then you have to walk through it. English lets you end with 'for the money', so learners treat 为了 like a verb and stop there. Native ears hear a sentence amputated mid-step. Nobody knows what you actually did. Close the loop by naming the action the goal paid for. If you truly want the goal at the very end, glue 是 in front of it.

因为 points backward at a reason for something that already happened. 为了 points forward at a goal you are aiming at. Nobody chases a rainstorm, so 为了下雨 makes no sense at all. Run one quick test on your sentence: did this thing already cause it, or am I steering toward it? Cause gets 因为, goal gets 为了. Messing up the swap flips your whole logic, and listeners get confused about which way time is flowing. “老北京们去茶馆，就是因为想喝茶，也为了跟朋友说说话什么的。” ── 《这还是茶馆儿吗？》

This is actually the most relaxed everyday pattern. When the goal trails the action, you glue a 是 in front of 为了 to hold it in place. Drop that 是 and the sentence sounds like a telegram: 我学中文为了找工作. It's understandable but clipped, and a coworker would probably rephrase it for you. This layout is gold for excuses and jokes at the office. Try 我天天加班是为了你 when you want maximum guilt.