We built our vacation/maybe retirement home 2 yrs ago and just put in the pool. Our main home also has a pool.

How much pool equipment and chemicals you need will depend on several factors. Also where in the country are you?
1. Salt or chlorine pool? Chlorine requires you have a big bucket of chlorine tablets at all times. Salt takes bags of salt but not as often in our experience.
2. Heater or no heater? They tend to be big.
3. Spa or no spa, does spa have it's own pump?
4. Booster pump for pool cleaner or will you just use the skimmer?
5. Pumps for swim jets or none?
6. Trees in the yard or not? Trees mean leaves which means more cleaning. Unless they are palms, of course.
7. Is it cold where you live to the point you have to winterize?
6. Since this house is not built I would suggest leaving space on the side of the house closest to where the pool will be for the equipement. If this is the side with a wall to the garage you can have a door put in from the garage to the side?

We use a large patio box to store the vac equipment and floaties. We also have a stand that holds long floaties. Hope this helps.

If you want, you can store those materials in your garage or store room, though it will be slightly uncomfortable to bring it from a long distance. If you have space, you can build a small store room type near pool.