I wouldn't throw in the towel yet. You are not the only one paying high taxes. I am not sure what your overall strategy is, but here are a few thoughts.
Consider raising your prices
Target the market of people who are willing to pay those prices
Look into other services that are more profitable
Upsell on every customer possible
keep track of every expense and possible write off
get an accountant and see what they can do to save you money on taxes
These are just a few things off the top of my head. Again, you are not the only one who has to deal with this so, make more money.