Another thing I thought of is the cover. Yes, you need one. Consider that most likely you will be both un- and then covering your tub every time you use it. Even if you use it every day, its amazing the amount of dust and pollen that can collect or the energy costs left uncovered. Make sure you have sufficient room in your pavilion to accommodate what you choose, that may be placement from a wall or ceiling height or other issues.
I looked it up and I was surprised to find how affordable the cover lifts have gotten, even powered ones. So much better than the old days... I've seen hot tubs go from wood ones with wood stoves in my 70s Alaska youth, to swim spas, it's nice to see the covers move along with the times. It was always a problem on what to do with the cover, where to keep it, did it get wet, etc. in most older installations.
edit/ps: wood tubs took a tremendous amount of care and maintenance... not quite as much as a horse but a lot more than a fish tank.