I haven’t done site signs. I figure they are also a cost-to buy, install and remove. Probably cheaper to just leave them, so you need to factor in their cost to each job. I do something like 30-40 projects a year, half of which would not get a sign for various reasons. 15-20 signs would cost me something like $100-200 each = $1500-$4000, so need an actual return on them.