We've got a couple hoop buildings.

They cost less to put up.   That is their one and only + when compared to a confinement building.

The feed efficiency is worse in the winter which wasn't a very big deal when corn was $2, now with $7 corn you can't afford bad feed efficiency.

The death loss and cull % are both higher than a confinement building.   Wasn't as big of a deal when pigs were $25-$30, with $60 pigs its a pretty big deal.

Starting small pigs in a hoop in the winter time isn't much fun, for you or the pigs.

They take more labor.  Sorting/loading can be a real rodeo, need 3 people at the minimum.

They can't be cleaned out nearly as well as a finisher which is part of the death/cull problem.

Its a lot harder to hire the manure handling done so you're gonna need to buy some of that equipment. Solid manure IMO is harder to use as THE fertilizer source for a field.

Gotta have bedding, gotta have a way to handle the bedding.   Almost gotta have 2 people in order to get the bedding into the hoop and keep the hogs in the hoop.

I wouldn't build hoop buildings if you're gonna raise commercial pork and try to compete on cost of production.   Only way to make that work is with a niche market.