This is clearly personal preference, and a bit about contingent on your point of view on where market is going.  

Any preferred vendors for this and recommendations on the best way to set this up? 

Networking with local landowners and attending real estate meet-ups or county auctions sometimes, folks prefer a direct sale to an investor over listing with an agent.

To me it seems like an incredible pairing, someone who knows and understands to tools available and has the professional ability to leverage those tools not just for tax returns BUT also for tax planning and strategy.I'm a Stessa Pro member and in talking with the pro support team they do not have any preferred CPAs/vendors at this time.Does anyone know of CPAs who know the system?

Contractors live in fear of this because it sticks on their record forever when a new potential customer looks them up. 

For time horizons of 5 years or less, I usually prefer something safe like a HYSA or money-market fund.

@Brienne Metcalf, I prefer to have leases.

Their product was deemed an essential service and the preferred return would be cumulative.

Are they handling most of the interior design and finish selection, i.e. picking out the white oak flooring and designing the custom built-ins in the study?

You just have to use custom documents.