There is no OEM soft top for the 2-door Bronco... so the answer to your question largely depends on
which aftermarket soft top you buy.
The most popular soft top
by far is the
Bestop soft top... which is also the same soft top that is
sold through Ford Accessories. That one makes no permanent modifications to the Bronco, and you can switch back and forth between the soft top and hard top. The first install of the soft top will take a few hours for sure, but once you got it together it'll probably only take you a hour or so to flip between soft top and hard top.
If storing the hard top is too much of hassle with your move, Bestop also sells the
Sunrider, which you may be interested in.