Before I bid I reviewed the PCR, which indicated no issues whatsoever. 

I haven't reviewed the documents here but I suspect there is something that will suffice.  

Surely you will have the lease reviewed/prepared by a real estate attorney and consult with a tax professional.

Have an attorney review your contracts before you sign them. 

I paid $147k for a 1-bedroom condo here (ski resort area in winter, close to Yosemite Ntl Park in the summer) and have been averaging a bit more than $3500/month gross in the 9 months that we've been renting it on Airbnb (I think we might even be able to raise that a bit as we move forward, since we were just starting out, figuring out the system, getting reviews, etc.)

Hello, I was looking for a lawyer to review my P&S agreement as well as my assignment contract for wholesaling properties.  

Understandably, the lenders perspective is to investigate a borrowers liquidity and debt servicing capability, but what methodologies do you use to review the actual investment?

I advise you to review the screening materials that the realtor sends you and if possible, participate in showings so that you can learn more.

Reviews on Amazon seem to indicate this book is more fluff than content.

Watch out for those who want to charge you upfront fees for reviewing your loan and charges for POF's, most if not all are scammers.