I took my sofa out also, yes it had to be disassembled, built a desk to fit in that area.
Desk has drawers that offer more storage than was under the uncomfortable sofa.
That won't solve your sons problem, but....... how often does he travel with you? Kids usually love to overnight in sleeping bags on the floor.
We have 2 recliners and did not sit on the sofa. Just another idea, less expensive than a trade.
2001 Ford F-350 Super Duty CC Dually, 7.3 Diesel
2011 Cedar Creek 36CKTS Touring Edition
Full body paint, Cummins Onan 5500LP, Andersen Ultimate Hitch
We were on the road to ALASKA May 6, home Sept. 13, 2016. 23 states, 3 Canadian Provinces, up to the Arctic Circle, 17,300 miles, 131 days on the road. 1 flat tire, 4 oil changes. What a beautiful trip!