If you have amazon prime, it's best price there at $1500:
Circupool RJ-45 Plus
If your pool is 15K gallons you should be able to use the RJ-30 plus instead. Somebody correct me if I'm wrong on that. But if so with Discountpools .com promo (upgrade for $10 to the next higher cell) it comes out to $1260 for the RJ-30 plus. Which is is best price:
Circupool RJ-30 Plus
I believe Discountpools is a Circupool store front. Both located in Waller, TX.
On the kit and timing:
There's a misnomer with "salt water pools" that they're "different" than chlorine pools. This is not the case. They are practically the same. The only difference is how you are adding chlorine to the pool. Water chemistry will be the same so CYA, pH, TA, CH and resulting CSI are all still important. The only added parameter you will be testing is salt. Here is link on TPF for levels of each for SWG pool:
Water Balance for SWGs
On timing, if you are leaving in a week and will be gone, I'd wait to start up the system until you come back. Once you start it up, it will take at least a few days to zero in on what % you want the SWG running at so that chlorine level stays relatively constant. Still, if you get it in time, you can install the system before you go and even mix in the whole bunch of salt you'll need to add to the pool. SWG can be installed and you don't have to use it, so just have family add chlorine to pool like normal.
Important note: Test your pools salt levels with the Taylor test before adding any salt to the pool so you know exactly how much you need to add. Usually the salt comes in 40lb bags. Add one to two less than the calculation says and test after it's all been mixed in then add the last one or two bags to bring up to appropriate salt level if needed (test again). You don't want to put too much salt in the pool as the only way to get it out is a partial drain.
