I have a couple of websites that are hosted on other hosts and I'm considering to to buy a multi domain hosting with you.
Can you help in transferring my existing websites and would I have to pay for it?
At Chevereto.com we don't handle any server related issue. Migration should be made by your new hosting company, which nowadays is a very common service.
Our hosting partner (TMDHosting) does this service for free you when you purchase their hosting services.