OK, here's my idea, how does it sound?
Since I will be putting this mill as close to a bearing wall as resulting access to the machine will allow (centerline maybe 3' or so from wall), I will use two floor joists as the top member of a gantry by using the existing support on one side (the bearing wall) and about 6' from the wall I will span two joists with a 2X10 and run a 4X4 from this to the floor. I have in essence created a 6' wide gantry utilizing two joists as the top member. Then, in the middle of this 6' span I will attach a 2" pipe to the two joists using either the strongest store bought brackets I can find or make some out of 1/4" steel ( I can bend with oxy-acetylene and weld) and lag bolt these to the two joists. Then connect my 1 ton chain hoist to the middle of this pipe with a welded eye and use 6400# lifting straps to attach to the machine.