Hi Dave & Max
Welcome to the forum.
We have a 2 bed !st floor gargen apartment and also a hot tub at home in Blighty, for us these are the issues ....
250 Gallons of water weighs 1.136 metric Tonne plus the weight of the hot tub plus the weight of the people using it all concentrated on a relativelly small area of roof terrace . I do not believe the roof structure has been designed to take such a weight and PW will certainly not confirm it. (I have asked)
The hot tub water needs to be continually circulated and chemicals added to keep it fresh and clear, this is an issue if you do not live on Condado or have someone who can check this for you.
The running cost can be quite high depending on the temp of water maintained etc ours costs £30 pm to maintain at 38 C in winter in the UK. Obviously this should be less at Condado given the weather conditions.
So this has put us off the idea so far......
There is a company called Eurospas at El Pareton (about 10 mins away from Condado) I would suggest a quick visit there may give you some more information.