What constitutes a powerhouse in the modern era where there is no parity? Who are the current powerhouses? Clemson, Bama, Ohio State, Georgia. Why are they powerhouses? Good coaching and all, or most, of the top HS players at all positions go to these 4 programs. Will UT ever achieve the combination of this level of recruiting and coaching and run a "clean" program? No, not in near future.
My expectations for UT are what Brian Kelly has been able to do at ND. I do believe that UT can achieve this level of success. Although ND does recruit well, they don't have the embarrassment of riches like the the four teams mentioned. They are consistently in the top 25 and occasionally in the top 10 or 5, with an opportunity to play for a championship. ND develops 3 and 4 star players into 5 star players, especially on the line of scrimmage.
The problem, UT has to go through both Georgia and Bama every year. It will be much harder for them than ND. Those two teams have to see a decline in talent and UT will have to maintain competitiveness with UF.