First thing is to get the test kit and verify your numbers. If your CYA is really 200 ppm, drain and refill might be the best way to go. There are some on this forum that run high CYA , but around 100 ppm is the highest I've heard.

Many Home depot locations have a tool rental department. If there is one close to you, they'll rent you a 2" submersible pump and hoses for WAY less than $300 (you might be able to BUY one of their used ones for less than $300).
http://www6.homedepot.com/tool-truck...ble_2/0009112/

You might want to drain only 1/2 or 3/4 of the water instead of a complete drain. Then you'll have your CYA and can switch to bleach for your chlorine source.

Good luck!

Pappy