Re: TempOrary(sic) Shed For Year Long Refit
One, a temporary building, whether prefab or one-off, meets local building codes.
Two, a temporary building, such as the bow-roof shed, or the enormous , log legged and long span sawhorses I built, don't cost much and can be quickly demolished and recycled.
Three, cost and local acceptance of strange structures seem more relevant than other options.
Quick (and, maybe, dirty) seems very attractive for the single-purpose objective many of us have. I see no issue here.