Not sure if you've read through the whole thread but we ended up buying the Moomba Max. It has been great and I can say that after 2 seasons with it I would not go back to a jet. At least not if surfing is at all high on the priority list. My 192 did 49 mph and we don't miss the speed at all. As you know, these wake boats are not made for speed they're made for pulling a bunch of weight. We cruise all the time 23-30 mph or so and it's fine for us and caring about speed just doesn't matter when you drive one of these things, at least for me it isn't.
As for fuel efficiency my Raptor 400 and heavier boat is more fuel efficient than the 192 ever was. I can fill up 65 gallons and enjoy several weekends worth of cruising, surfing etc and not have to fill-up where as the 192 would eat 30 gallons in no time if driving it in the "fun mode" and you can forget fuel range if you add any ballast to a jet. Maybe fuel efficiency was bad back in your day of skiing but today's modern V8's and sophisticated hull designs allow these big behemoths of wake boats to be pretty fuel efficient, well except for a Malibu or Axis. You would be surprised given the speeds you cruise on a vdrive and can effortless hold speeds vs the jet which by nature is not going to be nearly as efficient. My wallet can certainly tell and I even run midgrade in this boat vs regular 87 on previous jet. You have to run premium on your SVHO engine so I know that thing drinks it lol.
Maintenance for me hasn't been a factor yet because when I bought my Max I got it during boat sales which also came with a 2 year free maintenance program with my dealer. After this year I'll be doing maintenance myself which is not much more than what you do on a jet in terms of cost. Yea I'll buy an impeller every year just to be safe and yea I'll be draining water from the engine to winterize but it's not much more than that based on cost and time. Thankfully the Max has super deep 5' lockers that you can literally get down in there without effort to work on or around the engine and it has large open vdrive access.
In the end my expenses have been VERY minimal going to vdrive. I guess i could chalk up an expense of now having a storage unit monthly cost instead of stowing my 192 in my garage but I'm also not towing anymore and I have 3 ramps within 5 mins of my storage facility. However the cost of the storage unit is less than it cost me to tow with my F150, so it's actually saving me money plus I got 40' worth of storage compared to like 20' in my garage lol. Aside form the higher payment of a newer and more expensive boat, it really has sort of saved me in the long run because it's minimal effort to fill ballast, no effort to drive to lake now that I'm not towing, fuel costs or cheaper and further in between fill-up's, ride quality is night and day better and overall the vdrive just works for us. We love it!!