Renovation

I have done some pretty extensive updates and upgrades on my '88 Prevost. It's paid for and I spend what I can afford when I can afford it. My wife and I love the floor plan and have never found a similar replacement in any age coach. So if you can spend $10-20,000 and still have the coach you love I just don't see where using that $20,000 to buy an $80,000 coach gets you ahead. It sounds to me like you just spent an unnecessary $60,000 on a coach that may not be as perfect as you unit you describe. You live in the RV 1000 times more than you drive the RV so ride and handling and engine and chassis is not nearly as important as being happy with the floorplan and creature comforts.
This is, of course, my view, my opinion, mine alone but if you love your coach, keep it!