The aggregating thing about concrete.

Build like an Egyptian. https://www.geopolymer.org/archaeology/pyramids/pyramids-3-the-formula-the-invention-of-stone/

Bad wheel. https://www.alibaba.com/product-detail/Flat-Tyre-Tires-Wheelbarrow-Colorful-Solid_1600155364660.html?spm=a2700.galleryofferlist.normal_offer.d_title.2ba34184iJ7i2H&s=p

Good wheel to all men. https://youtu.be/uXrrdHIR2w4
With the tool above you can make the thing below for about 10$ or less.
https://www.justrite.com/steel-wheel-for-gas-cylinder-hand-trucks-20-inch-35392?adgroupid=133520643115&gclid=CjwKCAjwkYGVBhArEiwA4sZLuDjHpHEMWlbirFo_8kCDFKN8Q9x3WJfkGkuZYpnPHxsHpBrtbk0NvhoCZ6QQAvD_BwE