It's a lot more realistic than you think. Consider the following:
Harris - His dad said he would only enter the draft if he's a lottery pick...he's likely to go at the end of the 1st round but unlikely to go lottery. Also, the potential for a NBA lockout may affect his decision.
Hopson - Has already stated he is coming back. He will not get drafted in the 1st round (meaning no guaranteed contract). He has improved every year and has a chance to be a late-first rounder in the 2012 NBA draft if he builds on his improvements this year.
Ware/Jones - Both have signed LOIs with UT (meaning we do not have to release them, and, if we do, we can place restrictions on the release). Martin should be able to convince the two to stick with UT. He's a dynamic recruiter and will likely have a nice staff with connections in ATL and Memphis. If Martin can convince one to stick with UT, it sounds like the other will stick.