The warehouse property was resold to a 4th party shortly thereafter, and we received cash enough to reduce our total remaining cash investment to $450,000.  

For what it's worth, while a joint and several guaranty is most common, I've seen and have been a part of transactions where the parties negotiated limited guaranties for each guarantor (usually based on their % ownership) adding up to the 100%.

Payment should be coming after all the party signed. 

If you think about AirBnB, it essentially acts as an escrow - a guest may book months in advanced and pay at booking, but the funds are not released to you until after check in.I would love landlords perspective from this community on if you would be open to using a trustworthy third party tool that offered this same service (ie. tenants pay whatever your deposit is to this escrow account, then 24 hours after check in it is sent to you).

The electric company has a form that can be filled out by the tenant and the landlord that allows a third party statement if the tenant doesn't pay their electric bill. 

Having said all of that, as long as both parties agree to the terms then there should be no hurt feelings. 

As @Bill Brandt suggested, go hire a 3rd party brokerage to handle it all. 

Yep, that part is easy and straightforward to me.

Third-party data supports the theory that the RRG area stands out as one of the top STR markets nationwide.

Tax Deeds for instance in CA are probably the simplest that I have seen and been a party to.