@jomcclain
I think you’re in a bit of a tough spot.
The budget limitation (we all have these) is leading you to options that are not likely to last. If you have the resources to replace the budget scooter in another season or so, then disregard. If you, like many of us, want to make a purchase knowing that it will last 3-5 years, then the old adage, “Buy once, cry once.” comes to mind.
The second tough part is the reality of temptation. Once a diver gets on a scooter, the diver’s outlook really changes. I’d say it’s akin to going from walking to riding a bicycle. You’re covering an exceptionally greater distance in a much shorter time at a much more efficient manner and able to take in a lot more scenery.
Diving with a scooter and not using it (except occasionally) would be like going walking and just pushing along your bicycle. Not many people are going to say, “OK, we’re at the top of the hill, I’m going to walk down.” A diver would have to be exceptionally disciplined to only use a DPV every once in a while for an assist. As others have said, the DPV can be cumbersome when not deployed and towing the diver. That factor alone may tempt a diver to just get on with the dive on the scooter.
Another opinion. With great capability comes great responsibility. Using a scooter can introduce an imperceptible risk. As indicated above, a diver can cover a lot more ground than he may proactively think about. A prudent outlook, IMO, is to think at regular intervals during the dive (distance or time) about a scooter failure and what it will take to get back to safety. My rule is to never scooter past what my legs and available gas can handle.
Because of this, my fitness program changed based on my purchase of a scooter. I doubled down on specific leg exercises to keep myself out of trouble in the event of scooter failure. So, while you’re looking for a scooter to relieve your husband from physical demands (noble intention), I think using a scooter actually increases the physical demands if one is to be prepared for a scooter failure. Fear one ‘may not get back’ should not be the first thought when the scooter floods.
OPTION #1: Pay for a personal trainer to help your husband get his leg strength back so you can enjoy the dives in your chosen location.
OPTION #2: If it’s not medically feasible to regain his leg strength through a personal trainer, adjust your diving destinations to where the currents are not likely to exceed his strength.
OPTION #3: Like
@scubadada recommended, pay for a DPV course for your husband to get some training and insight into what the options are so that you can make an informed purchase. I’d look for an instructor that has dived a lot of scooters and that isn’t just trying to sell you what’s on the shop floor.
OPTION #4: Buy the economical Yamaha, etc scooter knowing that it will be an experimental purchase and that in another season or so you may be on the hook for another purchase. Note this option will still require dealing with the above temptation and failure factors.
OPTION #5: Hold off buying until the budget loosens up a bit and buy a purpose-built dive tool that has a proven track record amongst more serious divers. Note this option will also still require dealing with the above temptation and failure factors.
Sorry to be so long winded or to complicate things…just trying to offer perspective so that you can make a decision with your eyes wide open.
Best of luck to you with your journey and let us know how you get along.