build a script or software for website that will check availability and allow booking of a bouncy castle

we require a script or php or what ever u call it to add to our website to do the following step 1 select a date step 2 choose from available bouncy castles for that date (so the script must check to see which ones are available or have already been hired out that day ) step 3 allow customer to choose the castle they want step 4 allow the customer to imput the details ,name ,address, contact number, contact email ,time they need the castle from and till , and location if different from there address , step 5 add extras to order like generators ground sheets ect step 6 conclusion telling them its all booked in ok and then it must inform us its been booked in some how may be by email the script should be easy to understand and use and easy to install and edit the castles we have in stock as we add new ones every month or so . here are a few sites with something similar on [login to view URL] [login to view URL] please only bid if you will complete this job ,as any one who wastes my time will be sued for loss of earnings and failure to complete on a contract