First, you will always gravitate to the deepest seat first, and you will be a soft boild egg in a few minutes being 104° to in the inner core of the body. You will want to elevate to a higher seat to loose heat, my wife is sitting in the highest seat within 15 minutes with outside temperatures well below 30°. It is a rush that you will enjoy immensly. She is overwhelmed with heat, but not ready to get out. You will remain be toasty warm. Of course, you can always get down in the water again.
Second, in Wyoming or Montana 100 miles could be considered local. In the Carolinas discuss this with the dealer while shopping, the lower you want the price, the less he is able to do for free. Considering the cost of gas today, it would not be unreasonable to expect a "house call" or "trip charge" which is only intended to not call them out for dirty filter problems that are not covered under any warranty.
Third, natual or propane, forget it. These are "small" bodies of water that are pridictabley going to cost you $30 a month electrically to operate (IF you buy the right one). Do you really think gas is cheaper, (NO). Not to mention the cost of installation and repairs because of water chemistry in small water vessels.
Start with your local dealer, visit the next closest dealer and think about the differences. Review you brochures, do some research in past threads, and page through the last 60, 90 180 days of this forum. You will get an education beyond belief.
THEN, get that Hot Tub delivered, because you are going to be whining and complaining to us why you waited sooo looong to do it. Without question, it is extremely unlikely that you can make a bad choice, but from your point of view, you only want to make an informed choice. Good luck and come back with some questions. Welcome to the board.