My comments come from a conversation with the previous university president that I was a part of. The state legislature has no appetite for funding/subsidizing another major sports program at this point. UVU would not only have to fund the program build out, but the yearly program maintenance as well. You'd need a sizeable endowment to be able to do so.
The UVU master plan, including the build out of the substantial Vineyard property, is, at least, a 20 year plan, including the soccer stadium. UVU's current sports programs are a long-term project, and there are no football options as part of that approved plan. Again, barring significant private investment, it's simply not going to happen. That is, of course, not taking into account the fact that UofU and Utah State, who have strong supporters in state funding circles, will actively resist having to divide the pie even further. This is evident in the fact that, UVU has to try to get UofU on board with even educational expansion (their engineering programs are a good example) or face resistance from UofU-friendly legislators. It helps that UVU's student body is growing, where the other major universities student bodies are shrinking (Utah State is losing a lot to BYU Idaho), but that "help" is primarily focused on expanding academic programs and facilities.