I was under the impression that a pool usually detracted from the sellability of a house, but maybe the selling price is increased too, don't know. I would assume that would depend on the area. You definitely have the advantage of finding this site before starting construction. You have a wonderful chance to do it right, install what you want and need, and avoid all the 'extras' that do nothiing but cost $$$ and grief. I think Michigan is pretty close weather wise to my area of Northeast PA. Maybe you're a little colder. I'm amazed at how many pools there are in my area which isn't exactly Beverly Hills. I inherited mine with the house in 97 and it isn't anything to show off but it's functional and has become my 'science project' to keep me busy in my retirement years. The initial cost is high but recurring costs should be minimal. Go for the pool.
Al