Implement ERPNext for our organisation

We are a small manufacturing firm and are currently using Busy Accounting Software. We are looking to implement ERPNext in our firm. We need the following: - Performing the basic setup including and not limited to System settings, business settings, Email settings, Print settings, User creation and role assignment, Daily backup and backup after every transaction. - Existing software data entry to ERP. - Understanding the business flow and updating the ERP with the same. - Other customisation as developer feels could help us. Initially we need this implementation, later on, we will be requiring an application for our salesmen.