For 300.00 your not going to find quality but it will satisfy your hunger for more effort as pits in that price range are fuel hungry beasts. I have Looked at the new Ok Joe several times and the quality did not impress me poor welding ad a very drafty fire box that would cost as much as the unit to fix properly.
For less than 200 you can get a CharGriller Outlaw and for the cost of 8' of 1" angle iron a piece of 12X24 expanded metal and a had full of machine screws have a pretty decent little offset that is pretty efficient mine uses 1 split every 45 min running between 275-300 deg.
I never met a Cow that I didn't like with a little Salt & Pepper! Certified PORK-A-HOLIC