Needing a CRM system w/Accounting

We have been developing a crm system in vtiger however developers are nearly impossible to find within our budget. Were looking for a opensource system that can be customized but also is widely used so we dont have trouble finding a developer. I will pay 15.00 to the developer that can find this solution for me. Below are a few things we will need to do in the software - Asset Management on Client - Billing - Online Payments - Service Agreements - Possibly Ecommerce With Magento - Vendor Management - No monthly fees - No hosting fees - MUST BE OPEN SOURCE