Hmmm. Buying a basic lipo charger will soon have you wanting more. And, if you want to charge more than one pack at the same time, you'll find that basic charger just takes two, three or four times (for the number of packs) the times to charge a single pack because the charger only packs 50 to 100 watts if you're lucky
High capacity mains and dc supply chargers are like hens teeth and always have been even in my car racing days. Those dual charger that are out there rarely have the power to charge multiple packs in an hour.
For my helis, I can charge six 5000mah lipo packs at 1C (30amps) in just under the hour. I use an iCharger 306B plugged into a 1200w power supply. Its not a cheap option though.
Note also that you dont want to charge lipo packs at more than 1C if you want a long life out of them.