Not sure why everbody's jumping on the gantry thing that's like $600 and still needs the optional trolley to be useful. OP, fill us in a bit more on what you want to do and what resources or budget you have to work with.
Pictures of your shop (or at least ceiling height) would help along with how much you want to lift and do you need to move it while lifted. My father had a 6x6 wooden beam going across the rafters in his garage. He had two 4x4 posts that he would put on each end of the beam that were cut ti fit snugly on the cement floor. The rafters kept everything from shifting sideways while the 4x4 posts took the bulk of the weight. You could only lift things but it was a lot cheaper than a gantry crane and super easy to store. I used it lots of times to pull engines.
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.
Where did you source your 2000 lb hoist?
Its actually a 1000 lb. Using the snatch block pulley doubles the lift cap. I actually bought two of them at a yard sale and sold one to a friend.
They were originally sold by Northern tool. They don't sell the same model but here's the closest to it. Now 1100/2200. Part#58925
Sorry, I'm having a problem with the link to Northern Tool. Keeps coming up with viglink? not the NT site I copy and paste from. Go to Northern tool and equipment and search part# above.
Northern Tool - Quality Tools for Serious Work
https://www.northerntool.com/shop/tools/product_200712245_200712245?isSearch=58925

And then my frontdiff slips of the table and destroyd my roofI just hang a chain over a couple of ceiling joists. But I never lift anywhere near capacity, maybe 500-750 pounds maximum.