I think it would mostly be alright if the work was shared out, or done on a rota system. Most of the time it's the underkeepers doing the graft and the headkeeper makes an appearance after brunch to delegate what needs to be done, then has a long lunch, does a bit in the afternoon, goes in before you for tea, comes out after you do to do a bit more, then sends you to sit out with the rifle until dark while he sits in front of the tv....then moans when you're 5 minutes late getting up for lamping after an hours kip lol
If you want to go into gamekeeping make sure you have a lass who can coo