Anyone have or built a pit cart?

Now that i have the trailer im looking at building a pit cart. Of course i will need to double check i can park it in the new trailer with the car in there but for now, im thinking 84"Lx40"Wx72"H with the following features.

44" (with bench top) and 27" wide tool chests
storage for nitrogen tanks
a spot for a generator
air hose reel
ext chord reel
lights
The rest will be misc lockable cabinets for jack, stands, nuts, bolts, liquids, maybe the mig welder, etc...

Ive found a place that sells a decent looking spindle kit and wheels and misc parts ( https://www.irvansmith.com/scart/index.php ). Due to budget im not going to add brakes right away, i will see how it feels and maybe retrofit them later if needed.

ANYWHO! My question is with the framing. I know some of the larger ones are made with aluminum framing too but i cant find any specifics on tubing dimensions. I figure everything above the base frame (lower portion where the wheels will be mounting and everything will be resting) can be done with 1 1/2"x1 1/2"x 1/8" extrusion with proper tube placement. But the base frame, id like to use something considerably heavier but if i go with a 2"x4" 1/8" or 1/4" tube, that will put my work bench height at about 44" or so depending on ride height.

and to be clear im definitly on a budget so a $10,000 cart pre made isnt really an option

 

i dont know... the tracks ive been to are pretty flat and from waht i can tell most dont have brakes. When its in position it can be chalked or some have levelers in the corners which isnt a bad idea.

Also, any utility/tool carts from a store like that is either steel and/or not ment for the weight mine would be.

 

im pretty set on building one. I enjoy making things.


I think im going to go with a 2"wx3"H tube for the base. I can get it in 1/8" or 1/4" wall. Probably go with 1/4" wall which will only add about 30 lbs (22 linear ft) but this is where the spindles and handle mount