We don’t market site visits, in fact we try to avoid them if possible. Site visits are the perfect opportunity to give specific free advice, and architects just can’t help themselves. Apart from the temptation problem there are liability issues too. Our preference is a meeting at our office, or somewhere neutral like a bar or cafe. If the site visit can’t be avoided it is $300/hr, and this is money well earned , as it can be taxing keeping potential clients off the topic of resolving problems right there on the spot.
