When to pay yourself from property income?

[Aaron M. VanVoorhies]

Hi everyone! Some friends and I are soon investing in a rental property and we're hammering out all the details before our first purchase. As of right now, our plan is to buy a multi-family unit, re-invest all income from that property and invest into our next property. With that said, I have a couple questions. When, in general should we feel comfortable starting to pay ourselves from property income? And also, how much reserve money would everyone recommend having set aside per property owned (for repairs and whatnot)? Thanks for the input!