Honestly, best thing I did was ditch all that and just read the handbook, specificially chapter 17 [1]. All of my jails are now set up manually, initially using /etc/jail.conf, and now individual jail configs in /etc/jail.conf.d/.

I still use vm-bhyve [2] for my Bhyve virtual machines, but that's been rock solid for me for years.

[1] https://docs.freebsd.org/en/books/handbook/jails/

[2] https://github.com/freebsd/vm-bhyve