First I'd like to say...Thank you to many advisers and users here! Though I have never posted in this forum before, I have read the expertise found in these threads many times over the years and have learned a lot here. The helped I've received here and through cc's support room has been truly appreciated...and any help you can give me in reference to the following queries will be equally appreciated! (I'm fairly new to RSD)
1. Updating/Making changes to a page;
Using CC's HTML editor I could design a website for someone who could then open it in most any HTML editor in order to change/update its content. But can you design a website using RSD without the person needing to buy and learn RSD in order to be able to update and change content on their own?
How do you handle those situations when someone doesn't want to, or cannot afford to, pay for your services every time they want to change some content on an RSD built website? Simple changes can be made with an FTP's edit function...But what about more complex changes?
I've tried opening an rsd-html file in cc's HTML editor, but it doesn't preview the page properly and I'm guessing it can't be done or I just don't know how to do it.

2. Website Costs;
I recently finished my personal website and I know a couple of non-tech savvy fine artists who would like me to build a responsive website for them. But I have no idea what a site like mine should cost and I have no idea how many hours it took me to make because I did it on and off over a period of months...plus I had to learn RSD!
My site has approx 200 images and 84 pages. Most of my pages have different colored navigation links and headings along with some button links that have image hovers which took a little more time than the norm...like this;
http://www.lawrencesupino.com/recent-work.html (hover only works on laptop/pc screens). Their sites probably won't need much of that type of design work...but they may need other elements such as an email form, mailing list form and slide show.
I've read so many google searches about "how to price websites" and the numbers are all over the place, so I'm guessing there's no easy answer, but any non-extreme suggestions would be appreciated.
Would you be so kind to please take a quick look at my website and tell me what you think would be a good price to give someone for a similar gallery style site; lawrencesupino.com
I don’t want to give them an hourly rate...I’d rather just give a flat price for the site (not including the cost of domain name/hosting/updating).
As an artist, pricing websites doesn't come any easier to me than pricing paintings.

Thank you for your time!