I would
A true Wingmaster, used in good shape would be a decent buy. At one time Mossberg (of all people) made a 18" bead sighted barrel for the Rem 870 that sold for around $100 bucks new. That would solve your HD issue.
A 30" tube is a monster, and I had one on my 1980 circa Wingmaster and one season tureky hunting with it, even as a young man, conviced me it was WAY too long and heavy for my use. I traded it away in a buy for a pair of 26" full and IC barrels, which served for years for all my shotgunning. Playing with shotshell quality allowed me to tweak the actual choke results. Premium shells in the IC barrel usually shot to modified standard. Cheap shells in the full tube nearly did same.
I haven't been in too many shops, even in recent years, that there weren't one or two 870 fixed choke barrels about that could be had for some bartering.