Using what @mdragger said, test your pool a couple times before you go. We can call it 24 hour CLT. Leave the pool alone, with the cover on. Test at the beginning of 24 hours and the end of the 24 hours. Do it a couple times when you are not going to use the pool. This will give you a decent idea of the daily FC loss. We can set it off of that.
Can you arm your neighbor with the FAS-DPD and have them adjust your SWCG weekly?
This is in your sig. Chlormaker CL02 swg. Can you point me online, I couldn't find this, just a spa module.