Accounting Software required

I am looking for an ERP software with source code. Interface should be intuitive, flexible and easy to navigate. System must be suitable for small to medium businesses. The software should have features similar to z.o.h.o or better. We prefer something that is developed already and ready to go even though we will have to make changes. When you bid, please include a demo of what you have available. Do not want to develop from start. Required features: Full accounting: Software must compose of all modules of accounting such as General Ledger, Receivable, Payable, Sales Order, Purchase Order, Job Cost, Bank Management, Payroll, Fixed Assets, and Human Resource. Inventory: Item Serial and Lot number tracking Accrual based and cash based: Option to select your preference during setup of Software Complete budgeting: Software should provide an option for soft and strict restriction by period or year. Drop-ship sale/purchase: You can change the shipping/shipper information very easily at the time of invoice, order, and PO..more Batch or Real time posting mode: Select option during setup. CRM and Help Desk: Software Customer Relationship Management (CRM) and Help Desk provides you with full contact management, leads, campaign and opportunity tracking with full analysis. E-Mail campaign: You can send emails to the groups of customers/vendors/prospects you select. Executive Dashboard: shows the company’s activities & performance at a glance. Multi-currency: Software can handle unlimited currencies. Customer management: Direct eMail button. Discounts per customer or by customer group, Contact management system.. more Sales analysis: Complete analysis with combination of the inventory item code, customer code.. more Price blocking: The option to block the price at invoice and order time. Sales management: Create and manage Quotes, Orders and Invoice with work flow Invoice negotiation: Discount at invoice/order time and also at payment time.. more Vendor management/support: 32 characters-long vendor code..., more Purchase analysis: Complete analysis with combination of the inventory item code, vendor code.., more Purchase by vendor class: The option to trace the purchase by vendor class in the financial reports such as Balance Sheet or Income Statement.. more Basic manufacturing/ Assembly Complete warehouse management: Bin allocation, transfers and multi warehouse.. more Multi-companies: You can run each company in a separate database.., more Multi company journal/expense entry Role based security: Should be fine grained Interface should be mobile ready POS: Prefer to have a POS that has the ability to work even if it looses internet connection from main server (Disconnected mode). Language : .NET, C#, or PHP Web Based Application Database: SQL Server or MySQL Complete software with 100% source code must be provided Complete Documentation must be provided Budget for this project is 1,500.00 - 3000.00