At a location that 70%-80%+ properties having a pool, it will be harder to rent if your property doesn't have one.
However, a pool is a big liability concern...
Always have a pool liability release ready for tenant to sign.
However, even if they sign, in many cases, you are still liable to some extent.
You most likely won't get $150 more rent (for the cost you incur).
So, all in all, better to not to have it