Here in the U.S., we've neighbors that decided to go with a timber framed mountain cabin. It wasn't overly large, say 30 feet by 40 feet. The framing, as in your case , was done by the company that provided the "kit".
Actually, the framing went very fast, no more than two working days. This was because the framing had been CAD produced and fit perfectly. The difficult part was the exterior sheeting, also provided by the framing comapny, but erected by the owner (with my help). The cladding is called Structural Insulated Panel (SIP for short) and consists of a 6 or 8 inch layer of closed cell polyurethane insulation between two sheets of what we call oriented strand board (OSB) similar to ply wood. These are engineered to attach to the building and do provide excellet, superior insulation properties. Problem is, all of the ducting for electrical cables, plumbing, etc., are done at the factory and any changes on site are nearly impossible. The sheets, about 4 feet by 8 feet in size, are light enough, but the pitched roof sheets still require a lifter of some sort, (hence my involvement with a front end loader). They are attached to the fram structure with long, especially made screws. It's something you'd want to be conversant with before making the decision...