I originally had the 800 lb electric cable hoist from HF. I had it installed on the back side of my twin post garage lift supported by thickwall schedule 80 pipe. The pipe was attached to the lift with HD U-bolts and the cable hoist could slide on the pipe from one side to the other. I now have a 2000 lb. (using snatch block to double the cable) electric cable hoist in place of the HF unit. The support pipe has been doubled. Now is two schedule 80 pipes, one inside the other, that are welded together that the hoist slides on.
A gantry would be nice to make the chain hoist portable. HF sells one of those but not sure of the weight rating. Hanging a pipe from shop rafters could also support your chain hoist.