none of the above  Any insight into other options?

Might be time to have a conversation about expectations—or consider other options if he’s not the right fit.

Quote from @Heather Luu: Unfortunately, you would have to re-key the locks.Here's another option.

Homewrite is seems like it could be a good option.

It’s definitely smart to evaluate the tax and cost implications of your funding options.

Maybe being a limited partner with some of the really good syndicators out there is an option to this route. 

Another option that requires more legwork is to call the servicer/ producer of the inverter.

Too many other investment options. https://www.neighborhoodscout.com/ca/san-diego/real-estateAs with any large investment, do conservative accurate underwriting before purchasing in San Diego.  

I don't have any brand preferences personally (I use Fantasy Spas at most of my units but I'm sure there are alot of reputable options), but just make sure wherever you place it is built to handle that type of weight.

LLCs tend to be beneficial for financing options if using hard money as it can be required depending on the program.