If it interests anyone, I have this humble offer.
I may have a few things to contribute :
A 8 meters long pool
I have all the diving equipment necessary for the photographer + a tank for the model to breath in between shots and stay in the same position.
We can use the space where the ladder is and put an underwater back drop to cover the tiles. On the ladder there is the swimming pool light that can be used as well.
The side border could be used to hold the spot light on each sides of the pool. There are garden plugs to supply the power.
The pool is 1.9 meter deep. Enough for a middle size model to fit and remain flying undewater with a little marging.
Since it is my private house, we can stay all day and all night. No issue. The barbecue is by the pool. Usefool for the makan break.
As equipment I am poor with only a prosumer olympus C5050. Would need a good dslr with casing.
But I have a Sea and Sea U/W slave flash that can come to support the key light.
Astin are you still interested?
I am open to joint the efforts and try to do something.