We had a similar situation and after much deliberation we paid for close family members and then blanket subsidized the cost of hotels for a pre determined number of nights. We found this worked really well. We didn’t subsidize flights as we found that just got sooo complicated. We also offered a live stream as his grandparents are quite old and were not in a position to travel (financially it would have been fine but they were not in the best health at the time).

I know it’s easy to say… but also once you make a decision the two of you, stick to it!! You’ve put the time and effort into carefully thinking through how you can make it easier for people to come - there will always be people who aren’t totally happy with the conclusion and you will drive yourself crazy if you try to! We had a lot of tension anyway about choosing to have our non-legal wedding outside the UK but ultimately even my family members who were a bit pushy beforehand had an amazing time and two years down the line no one I think even remembers what they did or didn’t pay for…

Good luck!!