Sorry but you won't find any plans for such a wild idea. There are too many mobile home connection problems to try to troubleshoot this over the web. This is a job for experienced carpenter(s) or cobbler(s) who can work and adapt on the fly and obviously neither of you two can do this. The trailers will need to be connected at the frame, floor, walls, and roof. They will probably need a new roof or someone who knows how to get the flashing right.
Removal of the siding depends upon how you are going to connect the trailers together. This project will be labor intensive and expensive and probably cost more that it is worth. My best advise is to rent the trailers out and make enough to make a house payment.