To have someone do it could actually cost a lot more than you might imagine. I have heard prices quoted for that type of work into six figures. One source was from a friend that, like you, had done the "hard part": reno on the frame, leakproofing the shell.
For that money, there are a lot of great trailers out there that are ready to travel, and won't take the year or so that what you want might take.
Do you have a idea of your budget?
If it's to be, it's up to me.