I suggest another approach may be fruitful: As you're offering the farmer/landowner a SERVICE at your expense in your time, why should you pay? Offer you will do it for free and give the farmer a share of the venison.
Don’t know about your part of the country but there are plenty people willing to pay up here which makes it a competitive market.
Depends whether the owner/manager wants someone to pay to run a zoo on their land or actually want them culled for environmental reasons.
There are plenty of people going about that have free stalking or get paid to do it, but they are not running zoos.