once you stop paying kyle has blogged about this What happens to my hosting if I cancel my membership at wa? so unfortunately once premium there i no going back to free on that account
if you have a domain you have purchased and decide to host it elsewhere you could have a starter membership agian under another name - or rejoin at any time in the future under the old account for an unknown time period.
phil

I know there was a time that if you stop paying for premium you lose access and your site is no longer. However I believe that you can leave and choose to come back and pick up where you left off with your sites by simply making a payment. I think after an extended time frame you would have to completely start over. You may want to inquire with support about that option as it allows you to leave and come back at a later time.

Hi - you can't do that. Once you have been a premium member, you can't go back to being a free starter again. When you cancel your membership, you will be locked out of the platform.

You will need to move your domain to another hosting provider before you cancel, as it will no longer be hosted here. You need to do some research as to which provider will be most suitable for you, as they all charge different monthly fees.

That's not possible, unfortunately, once you upgrade to Premium you can not go back to being a Starter Member.