IMO that is way overkill. I used to work in a lab, and I've used that type of pipette many times. We just don't need that sort of precision and accuracy for DIY. Plus, it's only going to be useful for very small batches as the max volume is 1 ml. That sort of pipette, to be as accurate as it's made to be, also requires ~yearly calibration by a technician. It's not something you can do yourself unless you have a scale that will accurately weigh small amounts of liquid (very expensive) and it requires disposables as well (pipette tips) although I guess you could get one box (96 tips) and reuse them. That one being so much cheaper than they normally are... I can't say how accurate it would be anyway. It makes me skeptical, but you never know.
I've also used the type of pump bulb that cool breeze listed above. You could get a 10 ml one, a 2ml one and a couple of glass pipettes and be way more accurate than 99% of the people doing DIY. No need to geek out on this. Does it matter if your
juice is 18.0000 mg/ml? I doubt the concentration of nic in your base is that accurate anyway.