The wife and I bought an ambulance, and we've got about one month to get it ready to live in before we move to another country and live in it for several months! 

It's a 2008 Mercedes Sprinter Diesel automatic with 163,000 km. We bought it from Germany and drove it home in 1½ days.

It's got a built-in 12V system with 100ah battery and inverter. It must also have an AC-12VDC charger somewhere because it has an external shore power connection using a specialized emergency vehicle AV connector (which I plan to either get an adapter for or replace with a standard connection).

I'm planning to change the electrical to 24V and getting 400W of solar. I considered keeping 12V and just replacing the battery and adding an MPPT, but probably the equipment is all fairly old and due for replacement anyway. Hopefully I can re-purpose some existing wiring though. I plan to buy a Victron EasySolar II to handle shore power charging, inverter, and MPPT duties, and a 12-24V DC-DC non-isolated charger to charge from the alternator.

For heating, we plan to install a wood-burning stove. We would also like to be able to use this for some cooking and also to heat some water for soup or tea.

We plan to buy a portable composting toilet, as well as a diesel heater for emergency backup. Appliance we plan on running are a projector (AC), coffee maker/kettle (24V), air fryer (24V), and some kind of air conditioner in the future (either mini split or portable 220VAC we already own). Also a fridge/freezer (probably Dometic 24V).

We will buy a lifepo4 battery with monitor built locally (25.6V from 8x3.2V cells with frame) for about €850.

We also will need to get a faucet for the existing sink, water tanks, and some solution for shower (ideally with hot water). For our bed, plan to build a frame that can be lowered and raised for our current 180x200cm mattress.

Any suggestions / questions? Anyone see anything I'm missing? 

Took the plunge with an AMBULANCE