Meanwhile I have started using the Google pool, a SwimEx swim spa with paddle wheel wave generation. It is really nice. Just too bad it is always booked up in the mornings and late afternoons. So I am thinking of getting one - in stead of the lap pool. The Google pool is a highend (model 600 w/ 28" tall current; cheaper ones have only 18"). The cost of the cheapest one will be close to 40K installed - close to 50K for the 600 model. The expected tax deduction is equivalent to a cash rebate of 5K. So at least a 35K expense.
That should perhaps be compared w. the 20K one-time cost of membership (plus $250/mo in dues) in the Alpine Swim and Tennis club - where the new pool likely will be opened this fall - I am still some way away from reaching the top of the waiting list. It will be busy in morning, noon and late pm hours, though.
So it looks like my options are:
A. A real lap pool, say 10x40, with cover and possibly vanishing edge: 75K - tax deduct
B. A SwimEx: 40K - tax deduct
C. A club membership: 20K + $250/mo
PS: I found a perfect outdoor shower to go with my own pool:
