It’s a big leap going from military life to civvy life, and it sounds like you’ve got a solid game plan. 

When rents and occupancy vary as seasons change, how do you average that out to enter it in the calculator?

As for STR/MTR vacancy rates, those can vary greatly depending on location.

We made the one room a game room which all adds a lot of value for a STR investment.

That amount varies from state to state.

Obviously the laws in different places may vary but I suspect that is how it would play out in most places. 

I have walked through and bought many hoarder houses but this fentanyl is a new game changer.. my hoarder houses have normally been bull dozed so I just send in the asbestos guy and he will be in full bunny suit.. 

Celtics game.

When it is a new development, it isn't uncommon to see someone use the date the Certificate of Occupancy was issued - perhaps that marks the "ready", but it still might not be "available".So you can certainly have a property in service in a given year, but not actually have any rental income - but certainly your facts and circumstances are much better if you can actually get a tenant in there, that (should) shore up your defense on that question ever coming up unless you are playing weird games just to get a given in service date for tax purposes.

This just speaks to the broader point that Airbnb is no longer an amateur's game.