I explored this option on my Kindle Fires, since they’re basically Android.
As soon as I saw the ‘static’ requirement, I gave up, since it uses DHCP and I didn’t want any IP address conflicts. Granted, this is at work, so there’s a greater likelihood of IP address contention. At home, this would be a pretty good option, and use an IP address outside your DHCP range.
My “WI-FI settings” in Android 8.1 don’t let me edit the IP settings. It will display it, but not allow editing. I am using a VPN, maybe this makes a difference?
I also wanted to mention that Kindle Fires are far behind regular Android versions. I think the latest is equivalent to Android 5.5