Focus on wooden units in small/medium-sized towns. This is hot right now. No lights, pre-paid for the year at around $2,000 per side, the advertiser pays for the vinyl. All you do is install the vinyl once per year. You can net around $3,000 per unit, and it costs around $4,000 to $8,000 to build them. Monopoles are still good in urban markets where the numbers pencil, but wooden sign numbers are among the strongest in the industry. Wallscapes also have great economics, as do 8-sheets.