Here is the labor rate calculator I use. Click on the download link if you have MS Excel.
http://nosecrets.com/Download.htm If you are honest with the numbers (like number of hours booked per day) you will come out in the $50/hr range. The $60/hr is probibly more realistic but still being on the minimum side.
Here is the WV tax information:
http://www.state.wv.us/taxrev/taxdoc/tsd310.pdf A lot of EC work would go under capital improvment and would not be taxible to the customer.
Tom