Despite this, they placed a tenant with a 530 credit score, who paid one month’s rent (FPM collected their 50% commission) and the tenant never paid again.

Hi Hannah, glad to have you as part of this community! 

This is part of being a landlord - if you can't handle it:1) Sell2) Hire a PMC

--Did you even stop to think this through?

Working on this everyday.  

If you have any experience or knowledge in the Memphis area, will you please share your insight as to whether this is a normal fee breakdown or too much.

A strong deal presentation will help attract serious partners for this and future investments!

My question is, since we may not need to borrow anything to finance this, will the mortgage payment be affected? 

Any tips are welcome!

Depending on your flavor, this could be good or bad.Connect with a great property manager early on, as many won't work just any property in any part of the City.Being an east coast city, our housing stock is fairly old and unless it's been properly rehabbed, will have typical "old house" maintenance.None of this is meant to discourage you from investing in multi units in Baltimore, but I'd try to set realistic expectations about the market here.TLDR; we have a wide variety of "multi-unit" structures in Baltimore.