Old thread......
My old house I had a hot tub.... it was a Jacuzzi brand. The only issue that ever had was the "pillows" (sort of a plastic foam) failed after ~4 years. They were replaced under warranty.
Whatever you buy, make sure it's 220V and properly wired. Also, if possible, pull the panels to see what the amount of foam around the shell and the piping looks like - these 2 things will really determine how efficient it will run.
As far as chemicals go - get the water to the proper levels and do your best to leave it/minimally maintain it. Don't chlorine just because - add chlorine as you leave the tub. The chlorine will do it's job and most of it will burn off - so your next use the water will be sanitized but not leave you smelling like bleach. (that was at the suggestion of the Jacuzzi dealer).
I would clean the filters and replace the water every 6-12 months, and I replaced the filters only once in ~5 years.
I sold the Jacuzzi for about 1/3 the price I bought it for, but that was still a good chunk of change, because I was selling the house - it was suggested the hot tub adds zero value to a house but having hook ups does. This is because many people don't want them, nor want to maintain them, and those that do want them already have the house/yard prepped to add their own.