As noted, the reason you're not seeing points availability is probably because you're logged into a Hilton account that doesn't have adequate points. If you log out, you should see the point totals required.
That said, the three Hiltons near Disney Springs (Hilton Lake Buena Vista, Hilton Buena Vista Palace, DoubleTree Suites) all are usually 50,000 points per night. I've stayed at all three. The DoubleTree Suites is the only one I'd ever spend 50,000 points on. And, I'd only do it on a night when they are asking a lot. For example, I stayed there for 5 nights over New Year's Eve a few months back. Had I paid cash, it would have been over $250/night.
I personally can't recommend the Hilton Buena Vista Palace. They did a huge renovation of their public areas. It looks great but the rooms are in bad shape. On my last stay, I checked out after one night because the room was filthy. I won't go back until they fully renovate all the rooms. And honestly, I might never go back because I get grossed out thinking about that room I was assigned.
I stayed around 40 nights at the Hilton Lake Buena Vista over the past 5ish years. It's average in every sense of the word. Clean but generic rooms. Detached staff that seem annoyed any time they have to deal with a guest. Overpriced food. Chances are strong that you'll experience some sort of problem while you're there. I never once had a problem-free stay. Unfortunately, some of the problems were big ones...like being woken up prior to 7am by groundskeepers using leaf blowers right next to the building. (That happened on two separate trips.) The only thing it has going for it is the location.
Personally, I would never spend 50,000 for the Hilton Lake Buena Vista.