Taxpayer was a prime contractor subject to the transaction privilege tax on his entire fees where he was hired as a “construction manager” or “advisor” to use his contracting knowledge to supervise or coordinate several construction projects, as well as doing some construction himself. Where Taxpayer was one of the persons on the title of the property on which he oversaw construction, he was liable for use tax on the items he purchased from retailers who knew him to be a contractor and did not include a charge for tax on the purchases.