http://www.kentonline.co.uk/maidstone/sport/stones-stand-to-open-122545/£750,000 it cost and took 2 months to build.
To be fair to Beds, whose been heavily criticised on here by many for his costings….2 of those would 'only' cost 1.5million on this spec and that would increase the capacity to about 9500 straight away!
Add another 2.5million for a basic re-fit of the East with boxes etc, then i reckon thats all doable for 4million in total. Who knows. But maybe not as expensive as many people think!