hi Pete E
i hav the use of 2 chillers at the father inlaws
the 6x8 was a freebie about 15 years old which i had an old air conditioning unit fitted to it with filled with refridgeration gas, works damn good

utlay was £200 plus a bit of venison
the other is 10x8 free from a flower shop when it closed down and the father inlaw fitted a proper unit to that as he does a few turkeys and geese for christmas not sure how many deer they will hold as i hav never managed to shoot that many in one go but like you said no more getting up a 3am, shooting 2 roebucks back for 7am and the having to fight the flies off while skinning and jointing up before breakfast ,just bang them in the chiller, roe liver on toast for brekkie, go to work and skin and joint when it suits me,
as for the boar get a winch set up (damn do they smell )do not want to struggle lifting one of those