I also did the switch from TH to DP. Wouldn’t even consider going back. The only disadvantage for us has been being able to air down and park wherever you want. Has not been an issue yet. As far as maintenance goes if you look at yearly you will probably spend the same amount on one service for the Moho as you would for 2 or 3 services on your tow vehicle depending on how many miles you put on that tow vehicle. Yes there are the expensive items (tires) but that is a 7-9 year stretch (or more for some). All of the pros above are true like getting an extra garage to store your stuff all the time, no stopping unless it’s for fuel or to sleep, comfort is definitely a plus as well. If you look for a used coach just make sure you get all service records from the previous owner. It will tell you a lot about how they cared for the coach. I searched for about 4 months and found the one I bought out of state. Insurance is less than what my truck and fithwheel were combined. I would suggest that you maybe rent a DP a few times and see if it’s something you really like before getting rid of what you already have.
Good luck on whatever route you choose.