Put yourself in the shoes of the person calling and try to anticipate their concerns. 

The other option would be a Mini-Storage business, but, I balk at the thought of spending a million plus and having to manage it for the rest of my life.

Looking into a self storage deal, but need to do more digging before I decide.

If I were in your shoes, I would describe how much each people in the JV get paid, and who is responsible or in charge of doing certain things.  

As well as RV hook ups and storage tank for off grid. doesn't have solar panels but is wired for plug in electrical.

As well as RV hook ups and storage tank for off grid. doesn't have solar panels but is wired for plug in electrical.

Check out ikea  's modular kitchen With appliances ,open shelving and a 5 tier storage shelving unit (pantry)It could be a very efficient kitchen .Especially if it's  a really small space Can always add an island if it's open concept for more counter .

@Benjamin Barredo , I was in your shoes for a majority of this year..

That's using a GC and not doing much of the work myself (I only do tile work and TV/internet wiring myself), in New Orleans.The finishes are as follows; prefinished real 3/4" hardwood flooring (nail down), solid wood cabinets (flat packs from China), prefab 2CM granite counters (with SS undermount sinks), Frigidaire SS appliances, ceramic tile floors in bathrooms, ceramic tile tub surrounds, basic door hardware, recessed lighting living areas, smooth texture walls, builder grade interior doors and trim (door casing, baseboard and shoe molding only, no crown or window casing), painted hardiplank siding, builder grade vinyl windows, basic roof, fiberglass batt insulation.Our land costs are pretty cheap compared to west coast.  

As a guy at the ripe age of 58 who is set for life money wise, I've been in most of your shoes and situations at one time or another.