Real sorry to hear about your loss.
I have had first a Ford E350. 28’ Four Winds Chateau and then a Chevy 4500 29’ Coachmen Leprechaun. Both were used. Back in 2014 the Chevy & Ford wheel basis were an inch apart. My current wheelbase is 192”. I know my stock 4500 Chevy behaves better than a modified Ford E350 chassis in cross winds & big rig passing. It was the reason I bought my current camper.
As far as foot or leg room. I can now move my size 12 shoes ninety degrees and stand up in the Chevy and enter the house over a one inch “step”.
Find the layout you know is right and live with the rest.