I could be misunderstanding how this deal was structured, but wouldn't the seller who is on the underlying mortgage have an incentive not to let it go into foreclosure since their credit is at stake?

From there, it's normal DTI/Credit/Cash assessment for the new loan to determine whether you can afford the loan. 

First of all, you are on the right track regardless of the financing route you take.

As for lenders, look for local banks or credit unions that understand the value-add you’re creating in each property.

I believe Airbnb and Vrbo dont do credit checks is this right?

It’s great that you’re already networking and tracking the market.

Purchase price: $145,000 I am the managing and credit partner on this investment.

But, they have ZERO liability for the performance of that tenant.Second, 97%+ have no idea on how to screen a tenant, other than income = 3x rent and a credit score.

As lenders, well issue a prequal/preapproval letter if we've analyzed your income, assets (bank and brokerage statements to establish that you have the liquidity to afford the down payment, closing costs, and reserves), review credit of the guarantors, review the relevant experience to ensure that we're not throwing our money away on newbies that are wandering around in the dark, and have put together a reasonable plan of attack for the project.

I think tracking productivity will be tough unless you have someone on site that is checking their work at the end of the day and documenting their progress.