Go For It! Repair or Replace it Yourself..You Can Do It

I could do most all that as well. But the way these things depreciate it's just not worth dumping more time and money than needed into them unless it's your full time home or at the very least your 6 month snowbird home.
The only way I'd do most of those upgrade mods was if I bought a fixer upper RV.
I will agree most everything is pretty easily fixable by the average guy/gal if you have access to Google and or Youtube.