Nae bother.
Plenty of room all around. Probably don't need the houses in the north west corner inside the footprint, but I think they're being demolished to make room for the Berryden dualler if that ever goes ahead anyway.
Could also rotate it 45 degrees and move closer to George Street so not building directly over the railway.
You'd need to compensate the building owners of the industrial units but I reckon that would cost less than the extra ground work and piling you'd need to do to put the stadium next to the beach.
The stadium itself would actually fit inside the empty site itself too, but I guess then you'd need car parking, emergency access, etc, to be underneath the stadium.
Either way, a far better option than anything that's been proposed so far.