Hi Meryl, I'm a past planning board member for St. Pete Beach in Florida, which is why I'm a member here, and I own an art consulting company. Depending on scope, the plans we've produced have averaged in the $30,000 - $50,000 range. I can share some sample RFP's if you like, my email is email@example.com. This is not a side-door solicitation, so no obligation inferred. Generally, plans work best when they not only identify opportunities for public art, but detail operational and funding strategies that include achievable action strategies that fit your particular culture and align with your capabilities. I hope all works well for you, art done well adds value in a number of measurable ways.