for my DSMs and my serger I have a cheap luggage trolley that I got at a big box store and I strap the machine in the plastic universal case to it. for my Juki 2010 my hubby gave me a very large red and gray toolbox that has wheels and a handle from Home Depot. it's super sturdy and very heavy even when it's empty but I don't need to lift it much and he does all the lifting in our home anyways. Truthfully I'm not into classes or retreats so my machines don't go that far but I like having the option and sometimes I have been known to loan a machine to a friend that I trust. Plus I store them across the house from where I sew so it's nice to wheel them instead of carrying.