Yeah, I've seen them online. I could probably pick one up at the local feed store. But my neighbor has an actual Jacuzzi he will give me for free. Maybe worth the hassle of moving it. But I need to put in a pile of solar water panels first. I'm not paying to heat that much water just so I can soak.
I get my first year's electric bill next month, so I will see how well the solar panels are working out. Then I'll think about solar hot water. That's going to be totally DIY. Already got a bunch of old sliding glass doors. I'll need the copper tubing, some lumber, and the EDPM pond liner for the hot water tank.