I would personally prefer to keep the properties and obtain financing for equity in order to grow.

If you can sub-meter the water that is always preferred it just depends on how feasible it is to do that. 

For my next deal I would prefer to invest in a small multifamily property (2-4 units) around $250,000.

DSO Trends: Like DSOs, MSOs often prefer continuity for patient retention, but they may be more flexible depending on market dynamics.

I actually prefer if they were already gutted (less work and expensive for me). 

Tools like Roofstock and local property managers can make remote investing manageable.If you prefer to stay local, explore adding an ADU to your property for rental income if zoning allows.

That's why I prefer hydrogen elec production over solar/wind. 

Assuming it will be Single Member LLC (you as a member/manager), it will come back on your schedule E anyway, so only thing you loose is $800 in california and bit more of paperwork but that preps you for future.Note - this is a very high level advise and mostly a personal preference. 

Simultaneously, if this vacancy is a high percentage of the buildings total SF, I would market the property for sale to an owner-user who may be able to fill the vacancy at preferred rates while gaining investment income off the other tenants.

I haven't worked with anyone since we prefer co-hosting but know oodles and oodles of hosts that do it.