The practice area is quite small. I did a tour when I considered getting season tickets or and I was amazed how compact that area was. I'm not sure what upgrades they seek though.
Cuban set the bar with all his amenities.
They need to build something offsite, which seemed to be the plan for a while but with all of the renovation talk I haven't heard much of the practice facility except that is included in the big cost of everything. I would imagine a new building would be quite expensive and that's probably why Sarver is "chipping in" on the renovations, his share will probably cover that and only that but it appears he's actually paying a lot for the arena work. I don't know, I hope it's discussed more before it comes up for voting.