IMO as you put it yourself. The NS6 is rather big and with a V7 on each side it would take much space
If you are about to do some heavy scratching it is adviced to have a 2channel mixer instead of a 4channel mixer because it is a couple of centimeters smaller…. So yes it will limit function/playability and it would be better to grab a 2channel mixer.
For some babyscratch and easier scratching you would be fine with the NS6 as a stand alone mixer anyway.
Just for beatjuggeling and advanced scratching it would not be the best option IMO.
Try it out and see for yourself and if you think about a mixer take a look at Denon X600 and Rane TTM56S
Rane TTM56S is the No1 for scratch but the Denon X600 is also very good for that purpose and has built in efx.