Pricing is based on your budget and the amount of labor that your space requirement. You can estimate your fee to be about 20-30% of your budget.
First we have a consultation to see if it's a fit for us to work together, we talk about expectations and budget. Then we get down to the preliminary concept development, with your likes and dislikes, etc. A mock up will then be provided along with a purchase order for billing. You pay for everything but the service fees upfront. Once project is complete I get paid.
Aside from my experience after completing 18 various rooms. I have diploma for my studies in Engineering which makes me well versed in floor planning and blueprint. As well as a huge art background.