That's the problem spot is the stadium, the proximity to Mold Road, and how close that is to the by-pass means the side of the ground where the Turf pub is limited in how big it can go. The University next to it I'm not sure it they'd want to relocate, they sold the campus site I was at, years ago and relocated everyone to that campus. So expansion that way would be difficult and behind the other stand is student flats, which could be bought and moved. I'm guessing they'd possibly have to buy up land beyond the student flats and build big there, and possibly move the pitch a bit to help provide capability to increase the other stand.
Just writing that has added another zero or two onto the end in terms of cost in my thoughts. I'd love them to do it, but to get that far, it would make more sense to build the new Kop, which they've already planned expansion abilities into, get the team established in the top two tiers of the leagues and make sure they've captured the North Wales market. Then they should consider spending big.