I have no idea how much a tilt coaster would cost, but it's one of the coaster types I would like to see if the park can afford it. A tilt coaster could easily be marketed as a record breaking ride and Six Flags wouldn't be able to afford a record breaking B&M dive machine under the current strategy. I think Gravity Max is a fairly small ride (lift hill, tilt track, underground tunnel, loop, helix, brake run) and only takes up a space of 380.6 x 229.7 ft.
https://rcdb.com/1357.htm