Some people have requested I share my planning as I go along as they will be going also in the near future. So ill try to post some random tidbits.
Staying in Colombo is not recommended at all, nothing really do to there compared to everywhere else. Almost noone rents there own cars rather you hire a car and driver. The average price range is $50-$65 a day all inclusive, more then that and your getting ripped off and less then that and you should be nervous. Price should include miles, gas, ALL taxes and "government fees", tolls, English speaking driver, AC, drivers food. Some will have free wifi in their car as well as cover the drivers accommodations, some charge $10 a night to cover the drivers overnight stay. Most official hotels will give free lodging to the driver.