trouble is rich, £50 a day, they'll stroll round and may get 7 or 800 out, £50 a 1000 and they'll finish them in a day. but then theres terraced houses, £50 a day and they'll get 1500 to 2000 out strolling round, £50 a 1000 and they'll be finished by lunch.
tricky one that is,
but your right, £50 a day/1000 is more near the mark.
it takes roughly a day to get a 1000 out.
unless your davep, he trains with usain bolt.

derek