If the union concept goes through, I would believe each football scholarship player and each men's basketball scholarship player would receive an equal stipend. NCAA maximum scholarships for these two sports total almost 100. Title IX will require matching spending on women's sports, based on the proportion of women enrolled at the university. For ISU, around 86 women's stipends would be needed.
If the stipend is $2000/year, the additional cost will be under $400,000 for the football and men's basketball stipend and the women's program match. However, if the stipend is $20,000/year, ISU would need to spend close to $4,000,000/year.
The Big 12 requires each at least 6 men's programs and 8 women's programs, and a minimum of 16 programs.
It's my opinion the stipend will be at the higher end of the range. I think the first thing the NCAA will do is reduce the number of football and men's basketball scholarships to the Div 1-AA level for football (63) and men's basketball to between 10 and 12. If these two sports have only 75 stipends, ISU's women's stipends would be around 65, for a total of 140 rather than 186.
I think the Big 12 and NCAA will reduce the required number of sports to 14 but maintain the 6 men's/8 women's sport standard.