New realtors, new realty companies, new PMs aren't going to have those established relationships and *no* PMs give up the names of their people to anyone else because getting good people is difficult. 

And how do you approach balancing asset management between third parties and in-house?

@Khaled El Dorry This strategy is know as a consolidation exchange, and like what @Adam Bartomeo said a single buyer might be difficult to find.

This means there are no checks and balances to ensure all transactions are entered correctly.

When the police catch up to him your cousin is going to say that you told him he could have it for a WEEK not a weekEND and the police won't charge him because you gave him the car to begin with and its difficult or impossible to know what you may have discussed as the terms.

I understand I cannot legally require them to respond, unless the notice specifically requires it, like for instance, a notice of entry, but it's making it difficult to manage the property, and I'm not sure how to proceed.

There are so many IRS restrictions and prohibited transactions within a Solo 401K that it makes it difficult to navigate.

I had been trying to use Stessa but it was difficult to communicate with them. 

Financing can be expensive and difficult to find.  

It may trigger if you are paying down the balance aggressively during the prepayment penalty period.