The fact they are complaining online might be an indication the property manager dealt with them properly so be sure to ask the manager for their side of the story.I hope this basic guide helps.

On the property side of the meter is the property owner's responsibility. 

You need to understand the buy side, marketing to other investors, estimating repairs and exit for a flip.

(I'm currently living in Phoenix metro, on the East side, and specializing in lease options, subject to acquisitions, pre- foreclosures, etc.)   

Until you're making, in wholesaling, at least enough to support yourself (dont forget you'll pay more in taxes and pay for your own healthcare), keep it as a side gig for now.

I work on the commercial side of lending, but I can provide contact info for the residential RE Manager, if you like.

I like stuff north of downtown, northeast, and I like some of the stuff on the west side, on the south side of 40 bu Hillcrest. 

Their comp they were using was 3 highway exits down and the retail center was not road frontage and was behind other buildings and turned to the side.

I had to get my property resurveyed with lines in the correct spot to include all buildings along with surveys for the neighbors on each side of me.

This gets harder if you have many units, but if you goal is to stay small or grow slowly, I don't think it matters how you accept payment as long as it is not time consuming for you, causes tenant payment issues, or causing problems with your bookkeeping.I test drove Cozy for the bookkeeping side.