You always want the city on your side (or as close to it as possible) to foreclose future issue and that starts with finding out the how on your own before bringing an expeditor to smooth the process.

I want something that’ll automatically lock as the door closes

I have yet to see a hands off ADU addition obtain a valuation to cost ratio anywhere close to approaching what you site ($210k cost to add $350k of value).  

Regardless of your choice, it is crucial to maintain the property in good working order and have sufficient insurance coverage as a defense against liability claims.

I do not want to ruin anyone's vacation plans for those already booked next week and we close Monday.

You maybe be able to live for free or pretty close to it, depending on how extreme you get with it...AND make some decent cash when you sell as well...especially on the 5 year plan vs 3.

Ours are close to 90% Airbnb...I theorize it is because of the unit type and fact that we are always on page 1.

Because at the end of the day, YOU give it the grade, not others because it is a bit subjective.Example, Hollywood, CA: there are A communities and D communities very close to each other.

I'm one week from closing and have even less certainty than before it all began .   

Tenant pays all fees and the choice is theirs.