Regardless of whether your cull figures are going to be fairly low or whether there is a deer problem to solve, be certain to make sure you have an outlet for your carcasses, and get a good chiller.
And have a back up outlet - don't just rely on private sales. So many people say that they will take venison off your hands, but when contacted they only want half a loin and a bag of mince (and could you drop it off, please?)!
Or they say yes but not at the moment - can they give you a call when they have space in the freezer etc. etc.
Meanwhile you have four carcasses in the chiller!
This needs an amazing amount of time and organisation, and I would start this bit as soon as possible and don't assume anything.
Most butchers won't take venison, or only occasionally (and everyone else has already contacted them). Most game dealers, if you are lucky enough to have one nearby, will only collect a minimum number of carcasses so you need chiller capacity for that number, or access to a centralised/shared chiller. Some won't collect, so you need to be able to take the carcasses to the game dealer yourself. Don't ignore the amount of time you could spend either butchering and chasing/delivering, or organising carcass collection.
Also check the spec that the game dealer requires. Some won't take chest shot or lead shot (i.e. not copper) carcasses, and that isn't something you want to discover when you are parked outside their cutting room with a vehicle full of dead deer! There are plenty of stalkers, too many deer and a limited market so game dealers can be as picky as they want so will flatly refuse carcasses that don't meet their spec, or are dirty/full of leaves and twigs.
You should also contact your local Environmental Health at the council and register as a food business especially if you are butchering and selling/distributing, and don't forget that DSC1 doesn't give you Trained Hunter status, so either you will need DSC2, or Large Game Meat Hygiene qualification (your butchery course may supply this?).
If you haven't got an outlet for it, you shouldn't shoot it.
On that note - Good luck!