I really don't know much about these. I do however occasionally look at 4x5 prices and this seems just a bit high for its stated condition. There are advantages to a press camera over a rail or even field camera for field use.
Other thoughts: I don't know how well the plastic bodies hold up use or price wise. I think the holders are getting harder to get. It should be lighter than a 4x5, but that 4x5 neg will be a greater joy. And, after all, neither of these is intended to be a 35mm RF replacement for anything other than film size.
You can get 2 1/4 by 3 3/4 or so film, but I think you will find yourself limited as to the film types available. Before you spring for that film size, you should check to see what is available, and be sure that will satisfy your photographic desires.