I'd always "moved" myself until the last house move when due to work etc I realised DH and just didn't have the time to spend packing everything up.
It was a revelation and tbh I wish I'd done it before.
By the time you've acquired all the packing things you need (and you never seem to have enough) the cost difference is less than you might imagine.
The game changer for me was all the special packing solutions they had - big jiffy backs for pictures/large mirrors (and even sofas). Clothes rails that made moving wardrobe contents easy, padded boxes for electrical items, like TV's, record players etc.
Everything was properly marked and colour referenced with a map of our new home so we knew were every box/item was to be moved to.
A team came to the house and accomplished in a day what would have taken us weeks.
Unlike our moves, because of all the special packing nothing got damaged or broken.
Once in the new house the unpacking was so quick and the benefit was they took all the packaging away (so ethically better as it was being reused).
It stopped the problem of still having boxes to unpack 6 months after the move
which I'm sure most people have experienced!
The only downside I can think of is that because we weren't used to our new home we did end up with some things in rooms we later had to move as they didn't "work" there - but frankly that was a pretty minor issue and easily resolved.
If I move again there is no way I'd do it myself again 