Much as I may fancy having a venison business, the good advice of others who have done that and echo the words from folk kind enough to share their scars/experience on here, has prevented me doing that. For me, or most stalkers, opening a home venison business would be a really dumb move.
The situation seems similar to that of a would be restaurant owner.
The average new restaurant owner is someone who likes cooking, but as probabilities go, is not a apprenticed career chef. They buy or rent a place, fit it out with what they think is needed, often with new gear, slave away for two years, then are worn out, so take a holiday and go bust. They have just spent their life savings paying for fancy dinners for complete strangers, some of whom they may like as friends, others they may see as the dregs of society.
When professional butchers report on here that they can't make a basic wage out of a home venison business, and shooters who are turning over a lot of animals take 3 years to break even on the original investment by not drawing any wage at all, then what that means is most amateurs will lose money, time and sleep over something that is the same as the newbie restaurant owner.
If the OP really wants to increase use of venison, just sell the animals to the game dealer.