New here and have a few questions about replacing a roof

[Century]

Hello everyone, I am new here and wanted to introduce myself and possibly meet some fellow RV’ers. We are from Arizona…dying in the heat!

I am hoping I can get some advice about replacing a continuous aluminum roof on a 1979 36’ 5th wheel.
The roof was flat, but over the years of what may be neglect or people walking on it, it has low and high spots in it. The spots range from 6" to possibly 8" difference in height. The roof was coated with some sort of sealer paint...doesn't look like rubber roofing, but none the less, it is a mess.

My question is, can I drill out all the rivets’ around the outer edge on the roof, remove the old roof, add in any new stringers' to help strengthen her up and then lay down, .040 4' x 8' aluminum sheets horizontally across the roof area instead of rolled aluminum roof?

I had in mind to start from the back laying the first sheet and then overlap the next sheet by a couple of inches with each sheet as I moved forward while adding some sort of sealer between them as they are overlapped. This way there would be no butt seams and less chance for any leaking.

Does this sound like a sound plan? The material is thicker than the rolled roofing I saw for 50.00 a running foot which would cost me 1500.00
If I use 4' x 8' .040 aluminum sheets, it will cost me around 600.00.

If my idea sounds good, then what would you recommend that I use to seal the outside of the overlapped aluminum panels and outside edges of the roof I pop rivet back together with? Rubber roofing?

Thanks in advance!

Century :)