Build the other 2 sides first then? Do the Merkland first with a bigger capacity than now (must only hold about 3k?) then tolerate the reduced capacity for 6 months while the south is getting done. Do the main stand only when you are able to. Hibs had talk of moving to Straiton a couple of times, but the fans kind of rebelled against it which stopped it happening. Easter Road got redeveloped, and that move would have killed us. Aberdeens support aren't as geographically concentrated around their stadium as Hibs I would think, but out of town stadiums with minimal public transport links seems pretty dangerous to me for the clubs future health. I hope whatever happens works out for you fwiw.