PHP Browser Based Game Script Modifications/Additions

Looking for a knowledgeable PHP programmer, preferably one with Browser Based Game (MMORPG) experience. I have a basic game script up and running, but I need help with modifications. It is all text based (there are no graphics). You are bidding on a small script addition to the site. If I am pleased with the work, the winning bidder will be hired for ongoing work (on an hourly basis, so please include your hourly rate with your bid). The script I want is a farming "game". The player will buy land, buy tools and seeds, then plant seeds. After some time has passed, the player will be able to harvest the crops and sell them. The player should have the option to buy additional fields and plant different kinds of crops (some grow faster than others). The winning bidder will receive more details about the script requirements, but that should give you the general idea. Keep in mind that this script will be added to the game I am already running, it is not a standalone game. Thanks for your time!