Tanning Methods / Contacts

It’s been many years since I’ve tanned capes. The wet tan was terrible but then again so was the shop I worked in.
Looking into getting back into it. I’ve used only commercial tans for my shop. I like the tans from Wildlife Gallery and Wildlife fur. Looking to do something similar. It would be done on a small scale only a handful of deer and bear a year. Are the tans available from Mckensie etc the same as what those companies use? I would be looking at building a tumbler. So info on building that would be great also. I know costs involved with tools.