167230 crm software program

I am looking for someone to create a customer relationship management software programme designed specifically for businesses involved in the advertising industry. The aim is to let advertising sales staff easily manage sales records and calls. Rights to the software will be handed over to me once the project is completed. The programme should be able to be downloaded and installed on a pc or mac, hopefully with some sort of trial period built in. Hopefuly you can advise on the best and most secure way to enable this. The program should obviously have a database with fields for various details, such as customer name, email address,price etc, I will specify the full list of required fields. It should also have a calender which has an alarm/reminder function. A search function for searching records under the various fields. a login facility would also be useful. I will need you to co-operate closely with me on this project so that we are in agreement and understand exactly the requirements. Hoping for someone who has perhaps built a similar program and can advise and make useful suggestions as the work is in progress