Maybe cutting them a deal such as the one you proposed would be a great idea. 

Contractors should be willing to provide a free estimate and proposal.

Even though bank proposed this as a solution?

I have done almost exactly what you are proposing to do with house hacking a quad plex and I also am able to achieve $100 per door.

With all the positive news coming out from around the country regarding how companies are responding to the freshly passed tax legislation I can’t help but think about how it is proving the claims made by the Fair Tax about their proposed tax plan and proving its naysayers wrong.

If it were me, I wouldn't want to sign too long term of a lease, and be on the hook if Airbnb stopped panning out for whatever reason.For instance, in Boston, our mayor just outlined a plan to regulate how many days one can rent out an entire apartment on short term rental sites like AirBnb, (proposed 90 days per year).

It seems that your proposals should work...

Yes it is very possible Amazon HQ2 lands there, or one of the other 2 proposed sites in the county......and if it does, it will only have a marginal effect on values.

You use known market values and divide by known NOI to get the rates, then apply those rates to your proposed purchase (or rehab, or development.)  

Its a slippery slope with legislation, but if I can ride this wave for as long as I can I can put away some serious cash, so that if/when things change I will be well prepared to change my strategy into accumulating long term rentals or something like that.