We have used actuals and projections from air dna to come up with rent.

Can you actually sell your Air BNB as a business?

You can make minor adjustments based on the type of appliances (dishwasher, clothes washer and dryer, air conditioning, etc.) and the size of the rental.

Adding a 1/2 bath, new roof, central air or other typical improvements will increase the value of the property. 

After assessor comes out and consults with insurance company, they'll send demo guys out to come do demo work and remove wet drywall, insulation, etc. they'll usually put down dehumidifiers and let the place air out a bit to see what actually needs replacing and what was able to dry out.

If they do it outside and do it recreationally and not in absurd quantities, it will air out in minutes. 

Its my understanding that SF has pretty tight Air BNB restrictions like you have to register and can only rent them a certain number of days a year?

Purchase price: $313,000 Cash invested: $62,600 Vacation Home and Air B&B

Where are you getting your Air BnB projected revenue?

Prime LA Beverly hills  Bel air  Prime orange county anything on the ocean. 300k would be average I suspect ..