Also is this like a
wheelbarrow or something. And what do you plan to make it out of?

Have a metallic base, then the seat and storage would be made from a strong plastic.

Cool, yeah I like your idea its very viable.

Plastic and metal? no specific material, your going to fail your DT course

Try plywood or stainless steel

Please show Pics or links to designs you have in mind. My thoughts are usually there are usually ideas out there that you might draw ideas from to meet your needs. Most of all, see if this might meet your needs before investing too much time and
money.

I have had fun with custom projects and many were not new or different and some were good starters…

Spend some time on ebay, craigs list (discontinued items) and amazon so you don't reinvent a wheel someone else already did.