I definitely think you would need another person to help, but that you could do it yourself. Here is a link to a 4-part article by Todd Fletcher on how to take down a longarm for moving. I downloaded the article and it is very good. Lots of pictures, and he takes it step by step. He is using a Gammill for this article, but most longarms are very similar. Here is the link where you can download the PDF:
https://machinequilting.mqumag.com/2...todd-fletcher/