Some people like to put their tubs inside.....yet it is extremely important to engineer the dehumidification of the space so as to avoid mildew build-up in the house.
Hot tubs go great on decks; just make sure to evaluate the structural integrity of the deck accounting for the water and people that will be in the tub.
Gazebos provide great protection from the snow and wind.. and can add privacy as well.
Make sure it is a flat plain (might have a slight slope for drainage).
Another affordable technique. A small square wood platform will keep your hot tub safely off the ground...we prefer synthetic recycled decking material for its durability, yet pressure-treated decking is acceptable.
Crushed stone bases are popular in Maine and are the most affordable site preparation technique. We recommend at 6-8 inches of 3/4 inch jagged edge crushed stone, depending on the tub, and a pressure-treated wooden retention structure and an underground french drain (also of crushed stone) to insure no water pooling in the crushed stone [...]
While soil type can make a difference, we usually recommend a minimum of 4-6 inches of concrete, reinforced by wire mesh "rebar". We have a list of well-reviewed contractors for this type of work. Just email us and ask.
Perhaps these model backyards are something to wish for, yet don't think you need to spend thousands of dollars to create the perfect backyard all at once. Get the hot tub first and the rest will come into better focus!