Know that just because you are hiring a designer developer to help you build the site of your dreams, it doesn't mean you have to rely on them long term. One of the greatest benefits of the Squarespace platform is the usability of it for the most non-web savvy customers.
A Good Squarespace Designer Developer Will Create Something You Can Manage on Your Own
Once the project is complete (if you feel so inclined) and can also be there if you need help if you get in over your head and need help.
This information above was previously written in the Squarespace Circle Forum by member Veronica Morrison of Upside. She is an Expert Circle Leader and formerly founded and ran one of the Top 10 International Travel Blogs. She left the blogosphere to design custom Squarespace sites full time.