Try for online -- ACH is best as it does not carry any fee.

I am looking for a rent collection software that is flexible enough to allow online payments via ACH, Venmo, etc and also cash and check as I have a good number of low income tenants, some without bank accounts and some that are older and not internet savvy.

I guarantee if you do anything else it will cost you more money and heart ache. 

That risk muscle is something that has to be built.  

I’d rather pay a PM the 10% for the head aches or sell altogether if the maintenance issues continue since fully gutting in this area doesn’t make much sense either.

It appears that the Zillow service is free to the landlord and they make their money on non ach transactions with the tenant (credit/debit cards).  

Cashier's Check or ACH).

I know it is possible, however, constant turnover with short term tenants sounds like a head ache...

Personally, I use Rentec Direct for my ACH payments and rent collection. 

Three weeks later it was still there.Read the law, that seemed like a ball ache from start to end, so spoke to a local cop.Simple answer - push it out onto the street, and it would be towed for being abandoned.Which is exactly what happened.