Check on Arizona’s requirement to register a “converted” semi “class 8” truck to RV use or private use. Also check on insurance requirements if you “convert”!
Go for it!
Lithium for the win!
It’s your RV and your $$$!
You understand your RV and how you use it!
Do the research and make an “educated” choice.
I would wager if you choose to go Lithium you will understand the popularity of this newer technology.