Currently I work 3 days per week, and pay all the bills for both my girlfriend and I.
We previously (a few months ago) lived in UK, where she had a job alongside me. An opportunity has arose where we now both work in a different country (however only I kept my remote job).
My money arrangement is to have a shared account where all of my wages go.
Do the budgeting together and give your parner free reign over, spending seems the only fair way.
I'm hoping freelance will take off within 6 months or so for her, so she will also earn some income (albeit perhaps inconsistent), but either way I can sustain us both for a while like this (and was always the plan, if worst case and she cannot make any money).
Would highly recommend if financially possible. We're putting (much) in savings, but on the other side, we're using our prime years to build our passion projects.