Give them a price, design price included. If they say it's ok. we take 50% down, 50% on completion. Never had a case where they didn't like our design so i don't know how to help you there. Your between a rock and a hard spot when they don't like your design, it's hard to charge for that.
Here's what our initial quote says on the top
Thank you for your interest in signs and graphics from Colorado Signs! The following estimate is valid for 90 days. Colorado
Signs requires a 50% deposit upon acceptance of quotation with balance due on the day of completion of project. Colorado
Signs retains a lien on it's work product until full payment is received. Should customer not pay promptly all chages due, and at
its option may enter on any premises where the work product is located and take possession of it, recover from customer the
full amount owing, including cost of collection, interest at the statutory rate and reasonable attorneys fees, or both.
ACCEPTANCE OF PROPOSAL-The following prices, specifications and conditions are satisfactory and are hereby accepted.
You are authorized to do the work as specified. Payment will be made as outlined above unless other arrangements are made.