Just wanted to show you how to assemble utility cart from Harbor Freight. Takes about 10 minutes and all you need is a Philips head screw driver and a 14mm wrench. Cart holds 500+ lbs. Castors are meant for a flat service. You can purchase some casters with air in the tires so you can go off road with this cart.
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46x25 Utility Cart: https://amzn.to/3LG0VC3 (Better Value)
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Wrench Set: https://amzn.to/3R3to60
Socket Set: https://amzn.to/3BGwgA7
Drill/Impact Set: https://amzn.to/3DMdNEY