@Firpo - as @dennishoddy mentioned, a rental concrete mixer would make quick work of mixing concrete and with just a small slab you could park the mixer right next to the forms and dump the mix right out of the tub into the forms. No wheelborrows needed. Looks like you live in Lawton. United Rentals has a location in Lawton. I work for United but manage the branch in McAlester. Call them to make sure the have a concrete mixer available. Tell them you need it over the weekend. If you pick it up on Friday after about 3pm and get it back to United by Monday morning about 8-9am they should only charge you for a one day rental since they are not open over the weekend for you to return it. Use it for two days at your convenience and pay for one day rental.