17k are they having a laugh! Their average gate despite flying high in League 1 is 7,243 that would make the stadium 42% full. The highest they have had this season in the League is 10,071 which included around 2,500 away fans, that's still only 63% full. Can you imagine what 3,851 (their lowest attendance) would look like that's 22% full. London Road is pretty central and is a pretty decent ground so they aren't going to get that much of a new stadium bump!
They would barely get it half full on average in the Championship. Their best average in the Championship last time was 9,111 and the best average they have had in their entire history is 14,203 in 1961!
There's is future proofing and then there rank over optimism! they would need to be in the PL to fill that and their owners might be rich but are they that rich?