AirBnB is a great platform and continues to deliver great results for many hosts.

I'd do that or deliver pizza or do uber/lyft or write a credit card check before I forego a good SF deal with hard money.  

Tax optimization is not a topic that many people like to discuss, but it can deliver equal value as other landlording tasks.

It is difficult to have an efficient system at the beginning but if you have agents that you can trust and they deliver a good service, I believe it will be worth it.

He is asking us to deliver back 3% ($4800) at closing from our proceeds.The advantage is it seems this would be a done deal if we agree and he is already living there, and has agreed to forgo any inspection or further negotiations.If we don't not go with him, our agent will show the place, but believes the tenant will be emotional and a potentially jaded resident and wants to be there during each showing.   

Try CTB Contracting, I've used him for all of my work in the past and his crews always delivers quality work

Maybe delivering pizzas at night, etc.

He over promised and under delivered.

He's helped out realtors and an investor with lawn service on their listed homes and also delivering supplies for a homebuilder, so he'll be happy to give you a free estimate and work with you too.

If you are already under contract (in backup) and have delivered the earnest money, you could simply cancel and take it to a new brokerage and have them resubmit the offer..