I spent about $100 for my test kit and less than $100 in chemicals last year. I would find it difficult to spend $3700. I wonder why the maintenance on your pool is so much.
Pulled up a Quicken report from last year, replaced the pool pump, so that was a chunk of change. Outside of that, closer to $2300 per year. And about 1/2 is paying a guy to do the work of cleaning and servicing the pool. I’d rather spend time in the woodworking shop than chasing around leaves/bugs/etc with a net.
JLC