Thank you @Mesa Verde for the detailed reply.
I have been thinking deeply about it, the reason I wanted to open a retail butchery was not only to find another "client" to wholesale my meat to (and make profits on wholesale and retail side) but also something that I can sell down the line for my retirement.
Do you think having control of wholesale and retail is still not a big enough advantage to successfully pull it off in a mall setting? I am ideally looking for a location that will bring a lot of feet coming through the door and move a lot of meat on a daily basis.
The abattoir information is very interesting and something I had thought of before but passed due to high cost of setup, but I did some research and went on the mobile abattoir website (mobileabattoirs.co.za), it seems it was invented for use out in the veld, I have to look into it further and look at the possibility of a more compact abattoir something in-between a full abattoir and a mobile one that can share premises with the wholesale packing operation.
Thanks again for the help, it is much appreciated.