To charge 4S 5000mah for exampl, it takes 16.8v x 5amps = 84watts for a 1C charge. A 2C charge if allowed by the lipo manufacturer, would take 168watts (2x as much) and would need 10amps versus 5amps for the 1C charge.

The charger you linked is a 200watt charger and to run it at full power you'd need a PS with more than 200watts since chargers have some inefficiency, so with that inefficiency included, PS would need 250watts. Thats for fullpower. If all you're goping to do is 2C charges at 10amps, you'd just need 210watts, 1C charging at 5amps - 105watts.

There are a few 100watt AC/DC chargers, but they are ~$130. The smaller PS for 1C charging would be about $30 -

http://www.amainhobbies.com/product_...-138V-10A-130W

Your budgets a little short if the $70 was to cover both....