RVRoofArmor is a good replacement roof, but cost is going to approach 1/3 of value of the Suites. Friend of mine has his done but insurance paid due to hailstorm--believe it was in the $8k range for his 36' Excel. Even a replacement membrane is going to be $4k+ I would think.
Check out the brand Henry's roof coatings at Home Depot/Lowes. They have one that is compatible with your roof.
Also, check out DIY CrazySeal.com
2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired