Hi, Brendan! 🙂 Hope your new year is getting off to a good start!
We haven’t released anything official to resolve your issue, but I do have a workaround to offer. It turns out that turning off the field can be overridden. Here’s a snippet of code to add to your theme’s functions.php file (or some other suitable place) that should make the cost field UI display regardless of ticketing plugin:
add_filter( 'tribe_events_admin_show_cost_field', '__return_true' );
Please give that a whirl and let me know how it goes. Thanks!