@Anita368 There was a hot tub already in place when I bought my home so I decided to offer it as an amenity, as the courtyard it is in is attached to the suite I rent out. I went over how to use and care for it properly during my in-person house / amenities tour; I also had a 'cheat sheet' for the same purposes for guests to read if they did a self check-in. Out of a 160 guests, only two misused it (nothing catastrophic, but did need to drain and refill), and it brought us a lot of bookings, i.e., guests said they found our place via the 'hot tub' filter available for searches. We do keep it meticulously clean, and we do complete drains and refills often, but it only takes a few hours.
So, as others have said, above, if it will give you a needed competitive edge in your area, it can be worth the trouble and additional expense (chemicals, electricity, time).