beetroot/church calculation

how much land would we need to grow enough beetroot to provide a church with 200 families with a bunch every 2weeks for 6 months of the year?Beetroot might not be overly popular and grows quite close together so we might not need to use much of the farm to supply enough beetroot.

A bunch =  ~ big 4 beetroot
Beetroot spaced every 4in = 1 bunch per ft

Number of bunches needed = 26weeks (half a year) / 2 = 13 bunch per family

13 x 200 = 2600 bunch of beetroot

Area needed = very roughly 3000 square ft