As much as I'd love to rehab the properties to boost the ARV (which was the initial goal), funds are tight right now to do that so as-is is the way for me to go.Absolutely.

This might give a one-time (non-scalable) boost to cash flow, offer multiple value-add options, and allow the house-hacker peace of mind, via the assumed mortgage, in long-term breakeven or positive cash flow in the event that the value-add plans end up not being executed, and/or the person has to move out, and rent by the room or STR become unavailable for some reason at a future date.

We take ID's for all guests (in a website called Chekin) so would have documentation the booking guest is above 21.

Is there a website with just seller-financed listings that I'm not aware of? 

I never understood why people would have a flip, boost the value by tens of thousands of dollars, then sell it as opposed to keeping the equity and putting a tenant in there. 

It's a website. 

What is the website to find the lenders and their experience?

Quote from @Jason Wray: Kathy,When you use those websites you are getting stuck with a small list of lenders that sign up on their website and services.

However, Montgomery County as of yet has not updated their forms or website, included the landlord/tenant handbook and they are still not enforcing.

I've looked on the 203k contractors website and there's not very many.