All it takes is one bad offer to ruin what could be a feasible deal. 

Go to www.narpm.org and search their directory.If you make a mistake and hire a bad Property Manager, it can ruin you for life.

The manager can turn against you over night ruining your business.  

I just got a call that said he was diagnosed with cancer and doesn't know how long he will live.  

If you don't, your turnover window will be very tight, and all it takes is one messy guest to ruin a review from the next guest, as you may still be cleaning when they get there. 

Too many slumlords ruined it for the good ones.

im James 37 divorced male from Oh i worked in construction for several years im a single father my passion is to become a real estate investor but i need a mentor to show me the ropes a partner and a friend can't do it alone i have money saved back good credit but noway of knowing how to proceed ive read books and would love to work with good honest people i guess im looking to just be the father i always wanted to be to my 3 daughters i lost my house my job my family my mother had a massive stroke and later found out she had cancer id give anything for a chance and believe God led me here for a reason

Rent control will ruin my income.

It sounds to me, however, like you may have created a problem for yourself by telling them you don't want any rent, because it could ruin your chance to evict for non-payment of rent.  

I have an older army veteran who lost his wife of over 30 years to cancer earlier this year and is now looking to sell what once was their home.