Worth checking which provider has coverage over the areas you want to use. Most providers have PAYG plans either to have a lot of data. The link attached provides insight into whats available today - https://www.tigermobiles.com/blog/preloaded-data-sim/
The best I can find is - Three -
£60...
Might be worth cleaning it all and getting rid of the lot. The value keeps going down everytime Apple releases something new.
On the account issue, try changing the password and see if the errors goes away. If you have used the same email/ password combination on any other website such as email...
Based on what's on the tenancy agreement if you have shooting rights on the land, you should be able to manage the numbers. The deer belongs to noone but once shot belongs to the land owner where its lying dead. Do reach out to your local stalkers who does this and rather than a mass cull, its...
Any chance you might have sold an old device without logging off the account? Login to your iCloud via a browser and have a look at the configured devices. Remove the ones you don't recognise and unlink it from your account. Also worth changing the password to be on the safe side.
Do be wary of...
Best would be to get an air rifle and start practicing. Invite friends over and have a competition as to who can shoot the most. If that doesn't work. worth inviting a few locals who wants to do vermin control for free. May help keep the numbers down.
Hope its been patched/ updated as I have heard some models possibly having issues with the wireless adapter and the driver. Also worth trying to see if it helps giving a static IP to the laptop on the wifi router.
Worth getting some free sims from various providers to try out the range across the farm before deciding on one. Its not always the price but a reliable coverage that matters, in my opinion.