Spa advice: Set your kitchen chairs around in the pattern you're getting (circle?) and use a tape measure to approximate the sizes you're considering. Then sit a bunch of people in the chairs and see how it feels. Are your knees all bumping together? Then, have someone measure the height from the seat of the chair (bottom of your butt) to the height that you want the water when you're simmering in the spa. Around here the standard is 18", but I had mine dropped to 21" because I wanted the water over my armpits. If you have a tall torso (or big butt in my case) the standard height would put the water just above my sternum - too low for me. I also had the PB stagger the heights of the jets, so that each seat would hit a different part of my back, although the range is not huge. Hope this helps.

On the tanning lounge do you plan on having lounge chairs there? I ask because the dimensions sound tight, you might want to actually measure it out and see what it looks like. When I had my pool built the design guy described a beach entry that serves as a lounge area like 6" deep it measures 3' X 16' . I wish I would have measured it out on paper it looked adequate but it really is more like a extra deep bench. In retrospect I should have had it measure out 6' depth and 16' length.

Caveat: I'm not a builder, so this is just a consumer opinion. I believe the typical pool should draw more water from the skimmer than the main drain - useful for circulation and cleaning of surface debris. There are even some who claim drains are "old school" thinking and can be eliminated. Makes a 2-1/2" drain line coupled with a 2" skimmer line not make sense to me. I would suggest both at 2-1/2" but bow to Scott's more extensive experience if he revisits this thread. In my area the cost difference between a 10' stick of 2" and 1-1/2" is about 50 cents. Since there is no practical cost difference when compared against the larger pool construction costs, there is no reason not to have both in-floor and wall returns to be 2" except at the fitting itself. I have in-floor (but not cleaning) and wall returns and they are both 2" right up until the pipe penetrates the pool shell. In general flow/pump terms, to prevent cavitation noise and pump wear, the suction side flow capability should be the same or greater than the pressure (in-floor wall return) side. Hence something like 2-1/2" on suction, 2" on return. Note: two 2" pipes together flow about the same as one 2-1/2" pipe, so a 2" drain and a 2" skimmer all the way back to the pad is about like a single 2-1/2" from pool to pad. Rebar requirements depend on a lot of variables that are local to soil, etc. In my area (virtually 100% sand - Florida barrier island) 12" on center is sort of standard until depths exceed 6 feet.

That's a great find thank you! Did it happen to have the dimensions. I found a number of small pools on the web too but mostly the smallest ones I found were in Australia. In Florida there are all sort of rules about setbacks so I'm not able to put the pool to close the house or to close to the back fence which rules out some of the great design ideas that I've seen. It's just a matter of getting creative.