James
So many questions

IMO, with the more recent developments in rotary pad cleaning, you will definately be able to produce excellent results with a generic rotary. For a young business such as your own, I would pursue this avenue. The machine can be used for bonnet, skimming, encapsulation and shampoo, dry compound (at a push) and excellent agitation on larger, esp. commercial, jobs. Please note that Woolsafe don't recommend (generic) bonnet cleaning on wool yarns. It is possible though for an EXPERIENCED tec. to bonnet some wool safely with a "slippy" solution. Micro-splitters, IMO, are very borderline for this use. My preferred bonnet solution is one of the colloidals.
Although I've tried quite a few of the recently developed solutions, I still find that my Dry Fusion system performs to the highest standard. I also found in the earlier days that it was easier to sell as in effect, I was giving the customer something for nothing (ie protector).
If you were to purchase a branded system at a later date, you would still have good use for your generic rotary. I have both and would be lost without either of them.
Another option you have to consider is an OP machine. Many love them, some can't get on with them.
Safe and happy cleaning

The Ken