Stop in for a cup of coffee

So I’ve been working on a design for a welding and metal working bench. Made of 2x4x.250 wall tubing and a 1/4 inch plate, is 740 pounds too heavy for a work bench haha
I have a welding table, 1 inch armor plate. What do you think that weighs? 4 foot square....Got it at an auction, some ***** was tough to get home....