Inflatable hot tub?

Late to the party but my sister recently moved and gifted us her round Coleman hot tub. She used it for 2 years. We set it up on our front covered porch (reinforced of course) and it has been awesome. Keeps stable temp at 102. Manual says not to use under 40 degrees outside temp but she did without issues. We will give it a shot this winter and see what happens. Years ago we had a gifted full sized hot tub and it was unreliable and expensive to run. Very happy with the Coleman after 2 months.