Pictures are always helpful on forums...
You say “Significant number of hose kits” - I assume you know how much time/costs to assemble a hose kit. Also knowing your quality rejection rate is helpful in determining your process simplification effort.
Obviously, you’re going to have to invest money into the process and methods to save money – so be sure you do the math. I definitely would explore automating as much as possible.
Not having actually seen the product I can visualize that perhaps a method to consider to get the hose rolled up and ready would be to feed the hose assembly into a deep enough circular tub. Have you ever seen the Alaskan crab fisherman show? When reeling in a crab pot they feed the large diameter rope into a half barrow coiling the rope nice and neat.
You could manually and/or automatically feed a known hose length into the hose-tub- holder. BTW, there are simple machine that will roll-out, measure and cut the length of hose you need. This unrolling machine could feed the hose directly into the following.
One hose end would have been placed into a holder allowing access to install the hose ferrule. This would eliminate at least one step and if designed properly you could then crimp as need. Also after feeding the hose into the tub hose coil-er you could then tie-wrap or what ever to secure the hose for final shipping.
Ultimately the hose coil-er would be the right diameter and allow convenient access to both hose ends to install the ferules by manual or automated means.
And yes, there are all kinds of electric, pneumatic and other power assist machines that will crimp your ferrules quickly and efficiently.