Alright, you don't want to have to do any soldering, or wiring of any kind, and that is understandable. How about this idea. Get the iCharger 206b and a single PSU. I'm thinking 300 watts is going to be more than enough for what you are wanting to do. With the 206, you will be able to charge a 6s pack (at 300 watts mind you) at 11.90 amps. That is a kickin charge on a 6s battery. With charge rates like that, I would get the paraboard and do two of them at once. You could do 4, but y ou would be dropping down pretty low on your charge rate.
I will make this deal with you. If you want to do it this way, I will help you out in getting the PSU working. The only soldering that you need to do is to get the bullets soldered onto the tabs that are coming out of the PSU and short 4 pins together. That's it. No opening the case, no having to break the DC ground, just simple soldering. If you would like me to do all of this for you, PM me and we can work it out.
You can also do this same single PSU with the 306b, but you will be limited to 500watts, not 1000 watts that the charger is designed for. But it will work and it will give you room to grow in teh future when you are ready. Adding a PSU later on down the road is simple and we cna help you out with that. But for now, runnign it on 12 volts and 500 watts instead of 24 volts 1000 watts is perfectly fine on teh 306b.