I am on the opposite end with the battery life. When I first had P3a, I was charging it maybe twice a week. Same experience with P6a.

Now on P8, it seems a bit worse, but still I get easily 2 days from 80% battery.

I’m embracing no play services on my main profile. In general I don’t have any addictive apps(redreader was the worst) on the phone, so don’t spend that much time on it.

I used to update my Fenix 3 by downloading BIN files from Garmin website and just dropping it onto the watch’s filesystem.

For EPO I used https://github.com/scrapper/postrunner

First you need to define your requirements.

1. Is just for browsing and the router will be connected to a VDSL link with something like 100/250mbit?
2. Are you planning to have a server at home and transfer a lot of data within your LAN and need a lot of throughput?

If it’s 1, then you can get a bunch of used ac routers, something like Archer C5 or C7, flash OpenWRT on it and configure 802.11r within your LAN. This requires some fiddling, but you don’t need to spend a lot of money on a decent mesh.

For 2, well you with with €200 budget it’s going to be trikcy.