I work at a high school. My shop students have built numerous trailers using these plans. My only complaint is that even though the bill of materials is listed as a picture, the square footage of plate doesn't tell me what I need to know to get a quote on steel. I need to figure out if a 12" wide piece of 1/4" plate will be sufficient, etc. Most of the time weight is what it is sold for (I can calculate) but in some cases it is the size (width) and if I have it on hand, etc. or do I need to cut out a scrap sheet on our plasma table. I have had to buy plans just to do a quote for a trailer, and about 50% of the time they don't end up having us build it but we bought the plans. Also, since I bought it on a school credit card I have asked for a receipt saying it was paid by credit card 2X, I received a sales order, not a receipt after my initial request. Sent another one today.