Taking the idea to a local level, all of Bury, Rochdale and Oldham have problems with their own grounds. Too small, old and in the case of Bury, very poor access (one side).
It has been suggested that if all three sold up - prime housing land the three of them - they could move to a purpose built sports city central to all three and adjacent to the motorway. The clubs would keep their own identities, but the pitch would have to cope with 80+ home game in 9 months, only really possible with astroturf.
But the biggest drawback is simple....it's hard enough to get locals to go to the games when the stadium's at the end of their street, never mind off a motorway junction.
Same with Bolton, who moved out-of-town. In the Premier fans were *happy* to travel by dedicated bus or pay high car-parking charges. Now they are on the verge of the Third they will be far less happy, and unless the club offers free parking and/or buses, think the ground will be 2/3rds empty or worse.