I made a quilted bag with grab handles on the sides, a drawstring top and closing flap. I have a thin piece of plywood for a firm bottom.I also added a Velcro flap on the back - that was to attach it to a small handcart that I got at Costco. The handcart has larger wheels than a tote which makes it good for uneven ground/gravel. It also folds almost flat.
When I take my machine anywhere, the tote weighs very little - I use the Velcro flap to hold it on the cart, wheel it to the car. Unfasten the Velcro to lift my machine to the back seat, and use a seat belt to hold my machine secure. (No way I want that baby falling, or if I end up in a major accident, I don't want it becoming a projectile aimed at me!)
I fold the cart and put it on the floor in front of the machine.
If you're really in a hurry to make a bag/tote, you can use prequilted fabric.
I think I posted this combination on here when I made it, but I'll have to check.