Because you have a motor home and a fiberglass roof if I’m not mistaken, instead of a rubber roof. I know several guys who have used 3M VHB double sided tape to hold down their panels. No holes drilled. Stuff works great. You can also use flexible solar panels and just stick them down.
2020 Eagle HT 30.5 CKTS, MORryde Pin Box, Zamp Solar, Xantrex Inverter (16” wheel upgrade, springs on lower shackle hole)
F-250 4X4 Supercab w/SB, 6.2L,Camper Package, Factory 5th Wheel Hitch, Demco 18K Autoslider