I have a "store bought" hoist and have made a couple as well. Firstly, it is a bit more versatile if you use round pipe at the base of the upright fitted into round pipe at the receiver hitch. That will allow you to swing it around into the bed if you use it in a pickup, just make sure it will clear the tailgate when it is lowered. You can use heavy wall square tubing for the remainder. Make sure to get a GOOD weld at the base or it will break off/crack/bend when you get a heavy load on it. We loaded a mature Nilgai bull and bent the crap out of one the very first time we used it - there is a lot of force out at the end of the hoist. If you plan to use it for animals larger than deer, I would bend drill stem as it won't break. A don't drive with a swinging animal or you will bend a poorly made one or else screw up the receiver hitch.
