Adding 110v to trailer

I picked up a 28ft enclosed trailer Friday. Super nice trailer but it doesn't have A/c or electrical or a generator door. Does anyone have experience adding these components? I can do all the work, but am curious as to what bracing needs to be done to add a roof mounted a/c unit and for the wiring, do oem trailers with electrical run the cables under the trailer or is it all ran inside?

I have seen pictures where guys just ran conduit along the wall, but that is not a clean look so I would rather do it right. Also for the winch, should I mount it up front or off to the side and use a snatch block?

I'd do conduit that way your not ripping the walls and floor up

Roof AC will fit where a roof vent is but the roof bows need to be double up on both front and back of the opening to hold the weight.

What brand of trailer is it

United ult