We will lose out on $100k but get our cash out and the new investor will clear $100k by sitting on a deal for a year (while collecting rents).Does this seem feasible or something that would be attractive to an investor?

Closet full of clothes left behind - (now donated to Goodwill), Kitchen appliances (donated to Goodwill). 

The question is: Do I let her rent longer, continuing to collect, then renovate before the next renters' cycle (around March/April or later)?

If tenants are moving out right after closing, do double check the leases clearly show the security deposit they paid the seller and you collect that amount at closing from the seller (credit to you) so you have those funds to then return to the tenants when they vacant under your ownership. 

Also, focus on 2 years of job/income stability.Class D Properties:Cashflow vs Appreciation: Typically, all cashflow with little, maybe even negative, relative rent & value appreciationVacancy Est: 20%+ should be used to cover nonpayment, evictions & damages.Tenant Pool: majority will have FICO scores under 560 (almost 30% probability of default), little to no good tradelines, lots of collections & chargeoffs, recent evictions.

For market pricing, I collect LTR data from BP rent calculator and multiply by 1.5x.

IA will be building, collecting rent & and taking us on virtual or real vacation. 

It was obvious he valued the upfront fee more than the potential of a real partnership where we could collectively earn substantial profits (hundreds of thousands of dollars vs 10k) in a matter of weeks.

This raises the operational costs for hosts.Compliance with Hotel Occupancy Tax (HOT): STR operators must collect and remit the city’s HOT (9% for San Antonio and 1.75% for Bexar County)​. 

It requires a lot more work, follow up, and it's necessary to have systems in place to support the tenant vetting, rent collection and creating lease agreements.