If you are on a tight budget go touch screen. Im my home studio I use Dtouch with 27” touch screen. (You can have multible screens, I have one touch screen and one normal for video, metering etc)
With Dtouch you can assign as many user assignable buttons as you need, you have multitouch faders (are very responsive and accurate) and a lot more cool stuff (like overlayed panner for video) to make your workflow fast and easy.
There is another thread here regarding Dtouch.
But if you really need real buttons etc, then it is a no go for you atm. But they are developing a real 24 fader bank with few assignable buttons per channel. Don’t know when it will be out but they are trying to make it reasonable priced…