50k is possible for us and I agree with Romey, depends on what the new ground might be like. I think it may struggle to create the atmosphere we get in Goodison, there just arent many grounds left like ours.
On another note though I do think football attendances will continue to decline, ticket prices keep going up (mostly to pay players wages) and what value are you getting particularly given the farce of Saturday (sorry dont want to start a tangent), you can pretty much find any game you might want to see streamed on the interwebthingy - it isnt the same as actually attending but its better than nowt.