I make a Welder Cart with 8 inch Bench Grinder and Welding Tools Rack.
This is my best Welding Cart with the bottle supported under the welding cart benchtop and an 8 inch Bench Grinder on top of it. I have tool holders for the main tools I use when doing metalworking welding projects. I mostly work outside the shop and having all my metal fabrication tools on one easy to move trolley will make my welding projects much easier to set up and pack up.
It features two torch holders, a handy place to clip the earth lead, cable hooks big enough to also hold my long extension lead, a place for accessories and my 8-inch bench grinder with two parts trays and a grinder cooling water dish, on a reasonably small trolley.
I hope this video gives you some ideas on building your own custom welding cart.