Fix SF choice gates for re royal

Move the choice's gates out of ternary. Move their content from arrow functions to standalone functions to make the gating easier to compare. Fix several issues with gates. Restore messages that display if cash is not sufficient. Remove such messages for SF where they would have appeared in error if they had worked.

I have a long history with this event, but hopefully this puts it in a much better spot.

Closes #3426 (closed)

edit: sole source of truth for costs, including text, gates and billing. Use this to gate SF, and display note if you can't afford it.