I’ve been stalking the Jooltool website for a number of years, and I believe this Home Depot model is similar to the manufacturer’s least expensive kit, except the Home Depot model has the flexshaft and fewer abrasive disks.
The abrasives are the most expensive accessories, and no matter which kit you buy, you will need to buy more of the abrasives, so get the kit that has exactly what you need. When you compare the cost of accessories in each kit, the Home Depot listing is not much of a bargain over buying a kit from the manufacturer, especially when they have a sale.
The machine is identical in every kit, so if you are trying to save money, it’s imperative to figure out exactly what accessories you need because they account for the variance in cost of the kits. If you create an account on the manufacturer’s website, you will get notification of their sales.