That'll be tough without an actual degree, at least in the US. There are quite a few ways to do it, but without a degree you'd likely need 12 years of experience.
These are a set of 12 buildings pre-assembled. I've already got a modular city kit on the store now, so I'm doing something a little different with these.
You don't pay taxes if you're not a US person. You pay taxes in your tax residence. You gain tax residence in most countries by living there 183+ days in 12 months period.
I thought you guys may like this, being into animation and game art and all that rubbish. http://www.rockpapershotgun.com/2010/03/12/i-spy-a-brink-trailer/#comment-415048