We replaced the tires on our 2014 Southwind this year (7 years 40K miles) with Michelins 235/80/22.5. I had joined FMCA specifically for their tire program and quickly found it to be a total waste. My local tire shop beat the FMCA price by almost $1000.
I would strongly suggest talking with both a tire specialist and even Fleetwood and or Ford about changing tire sizes especially if you are only considering a change in order to save a few bucks.
Yes, Michelins are a premium tire, but my history on several vehicles with Michelins has all been very positive.