Entire books have been written on this...so best I can do here is give you the short version:
Buy a 2-unit place where one side is big enough for you. LIve there and manage it and rent the other part out: That will cover more than half your mortgage payment and maybe even 75-95% of it.
Try it that way a year and you will learn more than you can imagine. You'll either love it and buy alot of rental properties or hate it and stay away from the business.
...just my 1.5 cents worth
