As a courtesy it might be a good idea to let that agent know regardless.  

A broker shall not be responsible for supervising, nor shall the licensee be responsible for operating, within the scope of the brokerage or within the requirements of this chapter, activities that would be considered property management, including leasing, maintenance, and repair, so long as the real estate being managed is "individually owned" or "entity-owned" as defined below:(1) "individually owned" real estate is real property in which the licensee holds an ownership interest; and(2) "entity-owned" real estate is real property owned by a corporation, limited liability company, partnership, or trust, within which entity the licensee holds an ownership interest as an owner, trustee, partner, or officer, or in another beneficiary capacity.

I took the time to check out his site as i was curious.. and its a mastermind.. what i think could add value is that the frequency is there to keep someone on track.. the mastermind i went to is just quarterly then you hook up on facebook and facebook is basically showing all the members and their wives on the latest and greatest world trip they took or the building they just bought.. not a lot of real help for someone trying to get from here to there.. i think in that group most of them had on going business's like myself and there is fine tuning being done IE how to run a staff how to implimnet VA's how to run your sales crews .. other types of marketing ideas and tips.. this one looked to be not quite as real estate centric but I could be wrong as he had to add in passive income which of course is the buzz word for most who think that is what is going to create a better life for them ..  

If you like the idea of a self-directed HSA like @Kaaren Hall mentioned check out providers like Accuplan and IRA Financial Trust. 

Any other ideas on how to ensure our funds are protected? 

We sent messages to all residents and 3 didn't answer, so it seems like that is the place to start, but does anyone have any ideas on how to figure this out given the limitations?

How many people hours at what pay, plus cost of buying lists, plus skip tracing, plus phone/texting charges, plus office overhead and so on and so on.Noobs think texting is cheap to free ;-) 

Not sure it will replace GC estimation but at least will give you an idea. 

I tell all buyers to not trust my ARV and repairs since they have their own contractors and idea of what they think value is.

Do you recommend I property manage this myself, or would that be a bad idea.