@John Stover
Adding to what @Trenton Parks said, a clearly written business business plan with 1, 3, and 5 year goals should be defined before jumping in. First though, determine your end goal (E-Myth Revisited, highly recommended book). It seems to be cash flow related, but I'd put specifics to it.
With those things being defined and written then you can focus on strategy and production. Putting down 20-25% and using conventional financing is one way to do it, but its the biggest draw on your cash. If it were me, I'd go the creative route. You can do a lot more deals with creative financing than using your hard cash.
There are a lot of articles on creative financing on BP, but one easy way is to find a private or reputable hard money lender. Many will loan 100% of the purchase price up to 70% ARV minus repairs. If you buy your property 70% minus repairs (or cheaper!) then your out of pocket expenses are very minimal. Your cash can stay in the bank as reserves just in case things don't go as planned.