Depends how I prioritize things.
If I started on the character now, maybe a few weeks. Its always hard to tell until you start doing it.
With no animation just moving between spaces I could do that in a few days.
Right now I'm making a WorldBuilder.
So next thing here is:
Some landscape models, trees rocks.
General Editor things to do:
Structure builder, houses, bunkers
Brick builder, general brick building
Really only need the worldbuilder functional to do something simple.
Then I'll need the code that actually starts a game and runs that with rules. Then only about 100 other things.
The Short term goal I think is like a white board.
World Builder with some trees and stuff
1 type of guy that can move around
A die roller
No game rules, then you could run a forum game with it using your own rules, moving the in game camera around and taking screen shots.