PCBgogo

Realistically dispensing is not an option unless you want to spend a LOT of money.
PnP - you need to define your interpretation of low volume both in terms of how many boards and how may components are on those boards. You also need to work out what is important to you on the machine - easy to use software, size, price, feeders, capability, face to face support because these things affect what you should even be considering.
Printing- you still need some of the answers from above, basic manual printers are what they are, there's a few differences in the shrinking semi-automatic range and lots of old or new fully automatic. 
Reflow - yeah still questions, although most low volumes should be quite well suited with Vapor Phase which can be both compact and effective.
Conformal coating - well there a couple of brands out there that are pretty big in that department but before you get into automated machines, plenty of things can be done using a spray gun and suitable masking but this is a complex subject with all sorts of options and requirements like cleaning, ventilation, curing etc. Read some white papers, check out what other people who offer the service tell you on their websites etc etc.