Regarding HTTPS using MUP, I’m using mupx-letsencrypt quite successfully, free SSL certificates from LetsEncrypt, automatically installed and renewed - sweet! @tsepelev has been very helpful on that thread I linked. Depending on which version of MUP you’re using, switching to that fork shouldn’t be too difficult. I’m using Amazon EC2 with Cloudfront CDN and mupx-letsencrypt at https://www.virtualinout.com/.
Good luck with OneFamily, it looks quite impressive!