For Airbnb and rental units, forget about the saltwater vs classic question for a minute, because the real answer to your problem sits somewhere else entirely.
Here's what actually matters in high turnover, high wear situations: you need readily available standard parts. I'm talking next-day delivery. Because if your tub goes down mid-booking, you're bleeding money fast and your guests are leaving bad reviews. You can't afford downtime, period.
The biggest mistake people make is thinking warranty matters. It doesn't. Not for Airbnbs. Manufacturers now run addresses through algorithms. Hit Airbnb or VRBO in their system and you're dead. Warranty void. You used to be able to slip one past them, but AI changed that game. So forget the warranty entirely and focus on one thing: standard parts you can order from Amazon or any number of suppliers at 11pm on a Saturday.
On your current list, Hot Spring is a hard pass. These tubs are made in Mexico with proprietary everything. The plumbing is glued only, no clamps. Parts are expensive and part delays are endemic because they're all coming out of Mexico. You'd be back to a dealer for overpriced proprietary components every time something needed work.
Aspen is a regional builder getting squeezed out. They can't compete with the economy of scale from the big players. The build quality is decent, nothing more, and parts supply on smaller brands like this is always going to be spotty. You don't want that risk.
What you actually want is Instinct, built by Master. US made. These guys use glued and clamped plumbing, which is almost unheard of anymore. Everyone else either glues or clamps, not both. The clamps are your insurance policy. Everything on the tub is standard OEM parts. Balboa controls, top-tier stuff. Fully self-supported shell, full foam insulation that makes any repair straightforward. Highest plumbing reliability score in the industry.
And here's the kicker: it's factory direct to you, no dealer markup. You're looking at around 8,600 bucks for a 7-foot twin pump with 40 jets. That's unheard of pricing right now. Parts drop on Amazon next day if you ever need them, and anyone can swap them in and out. Nothing proprietary, nothing weird.
For an Airbnb in your area, Instinct is the only real answer. Forget fancy. Bulletproof and simple wins every time.
Now, about those salt systems. On most of them, I'd say no. Here's why: they're on dumb timer systems. That doesn't work in an Airbnb environment. You get low usage periods, then boom, somebody books and you've got full occupancy. Your chemistry goes yo-yo because the salt generator just keeps cranking out chlorine whether anyone's in the tub or not. Doesn't matter if it's Tuesday and the tub's sitting empty. It's still making sanitizer. That's a problem.
But here's the thing with Instinct. You can get the new Master Spa system on these tubs, and it's a completely different animal. It's on demand. The system actually tests the water and only makes sanitizer when it needs it. During the week when nobody's there, it trickles just enough to keep the water clear. Then you get a big bather load come in, and it automatically bumps up the dosage to handle it. Your chemistry stays dialed. Plus, it uses 30% less salt than the standard systems, which means lower operating costs.
This matters because bad water gets you bad reviews real fast. In a rental, your tub needs to be a plus, not a minus. Clean, clear, balanced water every single time someone checks in. This system delivers that.
