OhanaIce...we built our own truck(with A LOT of help from our friends). We are not in San Diego County, but if you have any specific questions or if I can be of any help, feel free to contact me (
localkine@comcast.net). I suggest reviewing the link ShaveIceLove sent you. Read EVERYTHING you can find and then read it again. Lol. Our HD was a great resource. They happily answered any questions I had and even offered suggestions and referrals to additional resources. Passing HUD was a lot easier than I anticipated. As with any building project, it took a lot longer and cost a lot more, even with doing a lot of work ourselves. BUT still much cheaper than the professional cart builders. Good luck!