Double the costs of your materials to cover the cost of materials and installation. Estimate how many hours it will take you to trim the bushes, weed the beds etc and multiply that times your hourly rate. Add the two together and you will be close. It may help if you update your profile because like stated by someone else, estimates vary by locale. $3000 sounds way to high and $500 sounds way to low. Good luck and I hope you get the job.
Last edited by RussellB; 10-05-2012 at 09:06 PM.