PB will seal the flagstone and I will re-seal at the beginning and end of swim season myself. My PB said he will come and do it for me at no charge the first two times so that I will know exactly how to do it myself down the road.
I applaud you for being on top of the re-sealing. In addition to doing it often enough - be sure to be using a quality product; don't be afraid to PM pooldv or anyone else to ask what product they use, or even start a thread just for sealant recommendations if you have any doubts.
Thoughts on equipment pad placement? (...) In this 12', it drops a good 3'-4'. I can't imagine putting an equipment pad there.
As long as you select the correct inch diameter rigid plumbing, are smart about turns, correct valves at correct places, and select the correct motor for your final situation, TFP has taught me you can overcome a drop of well more than this without issue. I read you're not too concerned with noise, so I'll skip all that. My advise is not to bulid the wall/barrier too close to your hardware. You want to be able to move around in there and should you ever need to replace anything, add in automation, add a bleach or acid tank and pump, you want to have plumbing room to tie these in, in my opinion. It is only another 6 inches here or there, but if you go small as possible, you're locked in to what you have, which might be exactly what you want if you go SWG, but if not...leave the room.
Goob if it were me I would give very careful consideration to the tree/bush in the middle near the original patio. It looks great on paper but it seems like it will restrict the view from the main patio and house.
I think all your planters look amazing, but I'd caution you from blocking the pool view from the home windows. I'm not suggesting any adult would ever leave children/teens alone in the pool area, but let's say there was some sort of thirst or hunger emergency in the kitchen and an adult were to rush in there - they might want to be able to glance out the window and do a quick head count after stabilizing the kitchen emergency, before heading back out.
All 5 though, asked what I wanted and when I told them chlorine without the SWG, they were relieved. Two of them had gone back and retrofitted their saltwater pools to chlorine because of the corrosion on parts and equipment along with the effects on the stone. Again, I'm wondering if the TFP method is what is keeping this mostly at bay as I know that water chemistry has a lot to do with how the water feels.
It seems there is a balance with trusting PB and trusting TFP posts. When it comes to actual 'how will this go over the long term' issues - I trust TFP 100% because they actually live with it for the long term, where as the PB will probably never be back after 2-3rd sealing on most sales. As for SWG advice from PB, unfortunately I believe the logic of the situation is that there are simply more emotionally compelling reasons for them to discourage rather than encourage. Their bias being what it is, and nothing wrong with that perhaps, it is on you to stand up for what is best for you. If you want a SWG because it is best for your marriage, then where is the further argument? Pick a stone that works, pick a seal that works, schedule it, budget it, don't skimp. Moving on. (is how I would do it, and I do have a lot of respect for you investigating this all so responsibly and respectably with regards to the burden the daily pool care would put on your wife). If you don't want the SWG, at least consider the underground tank with bleach and auto-add pump for her, right?
I don't like the drop for the fire pit. For me, it is moreso a good place to trip while trying to get around some chairs down there.
This was actually my first thought in general about all your steps. They look amazing. Fact. Whether you go straight or curved, so decadent and clean. Perhaps some small stair lighting is merited in an attempt to reduce trips/falls. Perhaps investigate some ramping options?
Lastly, given the slope of your yard, wouldn't splash out water all run down and fill the recessed fire pit area and have a stagnant water pool that would require manual cleaning/draining? If you go with the sunken pit, maybe it needs a drain.
Overall, it is a stunning backyard transformation that is sure to be the backdrop for countless experiences and memories. Feel free to ask infinite questions in this thread, we love it.