All things being equal, most investors usually anticipate the unknowns by including those cost in their budget.

@Boris Babakhan there's too many unknowns.

Since I'm just starting out,there are a lot of thins that are unknown for me.for example, how can I tell the property tax for every property before I buy it?

Hi @Michael RoetzelToo many unknowns.

Kitchen has had an active leak- source unknown- that has damaged most of the cabinets, master shower and tub are non-functional, AC unit needs to be replaced, garage door needs to be replaced.

Always look at the going rates and figure out your  rate will be about 0.125%-0.25% higher as those rates published online are truly a teaser, plus the unknown of working with someone no one can recommend.

I've dabbled in real estate for a few years(seriously only like 4 or 5), and now I am starting to get into the world of the unknown, taxes!!   

If he leaves you dodged a bullet, if he stays it is a unknown until time passes.

(*the seller is 77 years old and said he won’t finance for more than 5 years)For me it’s the idea of the unknown lending practices of the market  place .. trump will be out and the political climate may be very different from today .

If you do for some unknown reason rent to him do not hire him or allow him to do any work.