Help! i don't know who to invite

My fiancé is Mexican, I am Australian and we live together in Canada with our two kids. My whole family is back in Aus, his is in Mexico. We plan to have an intimate/micro wedding with around 15 guests, most likely in Canada. We don't want anything extravagant, just small and beautiful as we have a lot of financial commitments right now with property etc and want to keep the budget low.


Problem number one with guest list and planning is; how do we navigate the fact that anyone we invite will have to fly in for the wedding. If we have it in Canada. My family/friend have to spend almost two days travelling here, thousands of dollars and some have young kids and I feel that it is so unfair to expect them to do that. Is there a middle point for where we could have a wedding and it not cost a fortune?
Second problem is; I don't know who to invite. My family is also very broken and toxic. I considered having none of them at my wedding, but I feel I would never hear the end of it and probably get cut off if I didn't ask them to be part of it. At the end of the day, I'm almost certain some or most of them wouldn't come if it was overseas but I just don't know to navigate invitations when I don't really have great relationships with my family and would rather use my limited invites on my closest friends and their children as the love would be bigger. What do I do? I am a HUGE people pleaser and this is so difficult to navigate.
The third issue which is a combination of the two issues above is, even if we did find a middle point destination, i don't even know that a lot of my family would come for various reasons, so is there any point having it outside Canada?
There is a lot to digest, I appreciate any advice. I keep putting off planning because its just so overwhelming.