Totally negotiable.What is NOT negotiable is that you keep the lease and the option completely separate and unique. 

There is definitely an art to finding comps that the automated valuation systems fail at.Need to look at age, lot size, etc as well as other contributing factors like unique location issues like busy road, etc....not just simply home square footage.You also need to dig in to the details and filter the comp data for condition to essentially have 2 sets of comps.

There is actually a fairly unique strategy that could come into play here and one of the rare times we suggest an S corp for a holding entity for a rental. 

I wouldn’t recommend a Airbnb in a small town unless you have a unique draw such as hunting or water front. 

Make sure you know how to screen properly and have a solid lease that covers the normal Tenant issues (rent, deposit, noise, etc.) but also stuff that is unique to a roommate situation (shared common space, parking, noise, etc.).It has potential to be a great opportunity if you are prepared.

I like the unique way you found the deal and got into it as a renter.

Unless its a fairly unique attorney in CA that would know deals in Texas..

locals cant do it.. why not.. whats so unique that you cant get it done.. is it minimum of 6 months interest and you want to only pay for the money for the days out ??

Seattle's a bit unique since it has been the highest appreciating market in the country (double-digit appreciation rates) in a long time, so even when the market flattens it can feel like a crash (especially for those who continue to expect the appreciation). 

Also, not sure if there are any tax implications uniquely pertaining to DC or Maryland regarding the occupations and/or investments in Real Estate.