When they start digging your pool and your trenches it would be smart to dig some to where you think your pool house will be and put conduit in for gas/electrical/water then later you won't have to tear up your expensive deck to pull those. When your plumber comes out you can just ask him straight out if he'd take a little cash to throw in the conduit for you.
To be honest, if I were in your situation (and I'd love to be because your house is gorgeous!) I would put the pool equipment to the back or side of where I imagined the pool house would be. It won't make building a pool house any harder by having the equipment there. It would only make it easier since they could pull wire for the house through the conduit used for the pool electrical. And water would already be by the pumps to tap in to too...
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