Here's who SMU plays most over the next 7 years:
Cal 7x
Stanford 7x
BC 4x
Syracuse 4x
GT 4x
Louisville 4x
Sure, they will have some home games with Clemson and FSU, but I don't think the ACC schedule will move the needle that much over the LT. Look at the last 2 years. SMU has had >30k fans for 1 game, against a local school TCU. In 2022, they had 26.5k for Lamar, 35.6k for TCU, 24.8k for Navy, 23.6k for Cincy, 23.8k for Houston, and 15.8k for Memphis. And, those numbers are inflated. You would have thought with that home schedule that they would have sold more season tickets coming off an 8-4 season....nope. If SMU was going to the Big 12 and playing Houston/TCU/Baylor/Texas Tech/Oklahoma St., that would have helped attendance.
SMU does not have a large fan base at all and they are an afterthought in Dallas/Texas even during the Pony Express time period. What they do have is wealthy alumni.