Do they sell it for an above market price to compensate?

I DO NOT consider it part of my base compensation or predicate my budget upon it.  

Your time is valuable- if you need to hold for 5 years, as you suspect, well then you'd better be finely compensated for your time(and trust me, there's time involved) and for locking up your capital.

ON our retail product we have been able to raise price to compensate with no blow back or loss of sales momentum..

As a property owner and investor I need to manage risk and this is taking on extra risk with no corresponding rate of return to compensate me for that risk.

I worked out a deal with unit 2 to use theirs and I compensated them a set amount to run my heater and dehumidifier.  

No compensation at all was given to the fact that my property is brick and the comps all frame.

At 50+ units I would think you could hire a property manager that can oversee this operation and give them some sort of equity or alternative compensation...and you could probably start that now with 10 properties. 

They can compensate you for managing the properties (anything in excess of market compensation would be considered a gift by the IRS Subject to the 14/28k limit) and the income to you is probably taxed as well.  

Not related or compensated by them but feel free to tell them I recommended them so they know I appreciate their service. (12 SFR in Vegas/NLV, no MFR or strip/Henderson properties)