Where are you moving to? Because that's where you need to do your networking. And possibly figure out your own work visa issues.
Your main goal doesn't seem to be more time, but a different place and more money. Start by networking with local recruiters to get your foot into that market. They often can get you contracting jobs. Then you can network with locals.
Finally, full stack software is a big job - in fact it's many jobs, and rarely do developers do all of them (and never well). I've been freelancing for almost 4 years, but never completely on my own. I always team with other locals with different skill sets to tackle more complex projects with better rates.
Your main goal doesn't seem to be more time, but a different place and more money. Start by networking with local recruiters to get your foot into that market. They often can get you contracting jobs. Then you can network with locals.
Finally, full stack software is a big job - in fact it's many jobs, and rarely do developers do all of them (and never well). I've been freelancing for almost 4 years, but never completely on my own. I always team with other locals with different skill sets to tackle more complex projects with better rates.