Point-to-multipoint wifi is one option to achieve this, but without knowing more about the infrastructure, it’s impossible to advise if it’s suitable. You will need power at each “node” - so barns and outbuildings are great candidates for this (as are any private lampposts etc).
As someone who has XGS-PON (8Gbps symmetrical) - even I would argue that there’s almost no consumer use for multi-gig internet.
I run a Data Engineering consultancy from the office in my garden and as such transfer literal terabytes of data each week and host a number of development / backup / testing environments & services for my clients - so latency and bandwidth are key factors.
If I was just a run-of-the-mill nerd, I’d almost certainly stick with gigabit fibre.
The only silver lining here is that they left you enough Slack to pretty much put your network rack anywhere on the property 🤣
We get almost no lightning in the UK compared to the US - it’s very rarely a serious consideration for things like ptp antennas.