New Trailer: Sequence for preliminary tasks (wiring, etc)?

We are awaiting delivery of a new 8.5x18 car hauler which will be converted to a combination car hauler/camping trailer. I intend to do the following, but, without a trailer to look at, am unsure the best sequence to follow. I particularly want to avoid the "OOPS, should have done xxxx first" syndrome.
1. DC wiring for lights, fantastic fan, possible solar panels, deep discharge batteries.
2. AC wiring for plugs, possible ac, tv, fridge, etc.
3. Insulate walls and ceiling with single layer of insulation (no furring strips).
4. Possible installation of subfloor, floor insulation.
5. Central power center for AC and DC protection and connections.
6. Plumbing for propane tank, fridge, hot water, and cooking center.
Any and all suggestions welcome, including things I have neglected to consider.
Thanks
1. DC wiring for lights, fantastic fan, possible solar panels, deep discharge batteries.
2. AC wiring for plugs, possible ac, tv, fridge, etc.
3. Insulate walls and ceiling with single layer of insulation (no furring strips).
4. Possible installation of subfloor, floor insulation.
5. Central power center for AC and DC protection and connections.
6. Plumbing for propane tank, fridge, hot water, and cooking center.
Any and all suggestions welcome, including things I have neglected to consider.

Thanks