

It probably greatly depends on what you plan to do with your instance.
My instance is just used by me and occasionally my partner and some friends. Running it costs me nothing aside from whatever portion my energy bill is increased by having the container active in my home server. I already had registered my domain for other things, but a domain is $10-$12USD/year, which is basically nothing.









Most (maybe all?) of these items listed in the settings page for private spaces are differences from a work profile.
I definitely require my work profile apps to be able to run in the background at times, so a private space is not going to cut it, unfortunately.