Having a handful of trained packers means that your belongings get ready for transport much faster than you could do it on your own. Imagine that a three-bedroom house will take 2 to 3 hours to fully pack for full-service carriers. It will take at least 1 to 2 days to pack and load a 4-bedroom house onto a semi-trailer. This period of time may be shorter or longer depending on the amount of household items and how organized they are.
If you have a lot of things, it's best to start packing early and have enough time.