Your bulk is way too large for my use. When I worked at the Western Star dealer, they used the 150 pound kegs as well. In fact I get my grease from the same wholesaler they bought their grease from. More that curious if you are going to get an air grease pump or what? That McNaught one appears to be nice and I have to say my ARO back when I bought it was quite a bit more than that one is presently. You do have a compressor I assume and if you do get an air operated grease pump, I suggest putting an inline oiler in front of the inlet as well.