Originally Posted by brinleyinthewoods
Would love some input on:
Really depends on what kind of input you want, or what you even mean by "12 systems". You may have something in mind, this however is a very general term that can mean lots of things.
what is the best solar to go with
"Best" is what meets your needs. There is no single package that is "the best" on the market and that's a good thing- lots of competition in this space, folks really have to earn your dollar. Good solar is built by identifying your wants and needs, estimating how big of a system you will want and trying to fit that into your budget.
The more you learn and are willing to learn, the further your money will go.
Where to get 12v supplies
Lots of us use Amazon, however many things are available at local automotive outlets. Many automotive electrical parts are usable for other applications.
where is best place to get water tanks
Amazon and RV related stores have them. If you search craigslist you may also find entries. "Food grade barrels" are a very inexpensive option for fresh/grey/black tanks.
Best heat source
There is no best heat source, only various options each with their own advantages and drawbacks. Like solar, "best" is what fits your needs. Where are you situated / intend to park, will you have access to shore resources (power, water, etc) or not, those things matter.
Best way to insulate/not lose clearance (tall spouse)
Can you not lose _any_ clearance? We insulated our floor with 1.5" foam board with another .5" on top of that between the vapor barrier, plywood and flooring, I still clear the ceiling leaned up against the wall. Sure, there are taller folks than me out there.
A potential solution is to spray foam underneath the cabin, that way you only have to lay down plywood/flooring.
Must haves that might be overlooked
Hah. I think one thing people commonly overlook is sound. I installed speakers at each end of my rig, with the amplifier in the electrical cabinet. They fill it when playing music or during movie night, I think its a nice luxury item.