Just to make sure: Do you mean the old Reloop Beatmix or the brand new Reloop Beatmix 2 or 4?
Assuming it’s the older one:
Pioneer DDJ-SB, Reloop Beatmix and Denon MC2000 are all natively supported in the new VDJ v8
In the older/more stable VDJ 7.4.1 MC2000 and Reloop Beatmix are natively supported, but you have to download a mapping file for the Pioneer DDJ-SB. You don’t have to make it yourself. The 7.4.1 build is simply older than the controller, so that’s why you have to download the mapping file seperatly
Regarding pricing you have to buy the full version ($299) to use it professionally, or you can choose to rent it for $19 a month
If you just want to legally use it with the controllers, but not professionally, you can buy a controller specific license. For the 3 controllers you suggested the price for a controller specific license i $99
/Klaus