I got all four made today and was not bad at all in cost the wood was 26 and change but i had left over lowes gift cards that was 7 bucks so it was only $19 and the nails were free from my dads work WOOT WOOT. I only have the ones under the front as the rear tires are not on due to harware issues. but all in all not a bad deal for something that you can use on any thing with wheels. and I did go 12'' by 12'' on all fours FYI