lol sorry, but money orders and cashier's checks will draw lots of suspicion. they (esp moneygram and western union) have been taking more and more steps to prevent fraud, fake checks, etc. and require two forms of id, employers name, address, and phone number and various other things to cash it. not sure about issuing them, but probably some pretty strict shit on that end too. you cannot just have money appear out of nowhere and expect to go buy a house.
in my theoretical future
i will have a full time job and cash every paycheck i get. then, separate my earnings from my legit job from any income from the L's i'm pulling in every month. with the dirty money, pay for all your day-to-day stuff (restaurants, cheap used cars, electronics, entertainment, etc.) with that dirty cash. pay it IN CASH. i know when i bought my first car, paid with $4500 in cash to a used car dealer. they didn't say a word about it. next, after a few months, begin redepositing your cash. mix a fair amount of your dirty cash (20-40% of your clean money) in with ALL of your clean money from one paycheck. do this for a year and you've SOMEWHAT cleaned a lot of your ill-gotten gains.
NOW you can go buy that fixer-upper you've always dreamed of. once you do this, stop mixing dirty cash in with your clean deposits. pick up a list of foreclosures up for sale or auction from your local banks or foreclosure brokers. find a nice one under $100k, preferably in a middle to low-middle income neighborhood (read suburb). if it's not habitable, make it decently habitable and then move into it. this will be both an excellent investment as well as a learning experience for you. instead of wasting all your money on contractors, LEARN THINGS. go to the library (nvm, fuck that no one goes to the library anymore) go online and hit up howstuffworks.com and diy.com and start watching hgtv and tlc. you'll start picking up crazy DIY skills. begin rehabbing your house. make fake receipts for independent contractors ("they're just friends of mine uncle sam"). by now, you've probably accumulated a lot more dirty cash. while you're rehabbing the house, rock a sweet garden in your basement. not only will this provide you with cash for renovations, but even more laundry to do! hooray! when it's all said and done, you'll have a sweet house, awesome grow in the basement and will have cleaned a couple hundred k. go you! now sell that hardwood floor havin, granite countertop lookin, cherry maple cabinet wearing, home theater ass house of yours for triple what you paid. BAM! not only have you cleaned all your money, but you just made the best investment of your lifetime.
now do it again.