You need to look at your figures mate.
10x 120 bird days at £1500??????
Not possible to do unless you are willing to loss a lot of money.
At a 40% return you would need 3000 birds if you buy poults that’s 10k
Feed to get them ready to shoot at 20 weeks is another £4.500 pellets for 3000 birds will cost £3200 to get them to 14 weeks.
To achieve 40% you will need good cover crops, good woodland and cover crops are about £500 an acre to put in then they have to be fenced.
then you will need to buy all the feeders, drinkers, all the fencing for your pens, electric fencing. You will have no change from 25k and that’s not paying rent.
Then you need all the beaters and picker ups hospitality on the day the cost just go’s on.