I did market analysis to find the right rental rate.

Assuming I also use the Airstream for lodging while traveling for personal reasons, would I just take a pro-rated amount of depreciation for the amount of use that is business vs. personal?

My properties average 4.9 star cleaning rating, which is hard to accomplish given how petty some guests can be.

We talked about an aggressive paydown at a rate of $5k for the next 6 months to make the deal sweeter for the next person, but renting it would be preferable to that I believe since I can get a higher return on smaller development projects at a burn rate like that. 

If the rents are already nearing market rates, will she be able to go up that much? 

For lending, your rates are going to be higher than if you were to buy under personal name.

But I did not like what I saw, anything under what Costar would rate 4 stars did not appeal to me. 

You need to send him a letter with proof of delivery required (a cheap date with US postal service) and you can also post the Notice in a sealed white envelope marked confidential to his door - and take a photo of it for proof of delivery. 

It’s quite appealing as a long term investment - even at today’s rates.

In 1972 the 30 year mortgage interest rate was 7%.