Only thing that could be seen as a negative is you'll be paying a premium for their products and services.

Performance based pay is usually a percent of the purchase price or a percent of what the value is. 

Usually that rate of cashflow requires renting in a "war zone" type neighborhood that most people would shy away from.

I have been wondering if it is worth it as I have heard positive and negative about the results. 

I would say if dems take house and senate and negate the trump tax cuts that will have a very large negative impact on small businesses who are a big driver In the economy.No matter what, 2020ish timeframe expect a decline in home values and economy

I usually bring in fluffy white towels, toilet paper and some throw rugs into my vacant apartments to make them photograph and show better. 

Usually I hold on to my properties for a LONG time as rentals.

Yes, I am quite familiar with this size of space and you are right that it is usually best to combine the management with leasing so that it's worth the $ to do the leasing.

For tenants you think functional/durable which is usually in conflict when dealing with a SFH property.

It is usually best to discuss with CPAs  attorney, trustee and beneficiaries before anyone passes.