Vtiger CRM installation and configuration , with intergration with Issabel PBX

We have a running Issabel PBX system , we need Vtiger CRM installation and Config
Install/config crm (Workflows/cron, email in-out with attachments)
Inventory Customization (Quotes,Invoice,Sales Order, Purchase Order )
Config Customer portal
Free Extension installation
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Integration with Issabel PBX :
will need the following features
-Incoming call pop up
-Click to dial
-PBX Manager call history with voice recording with details.

The server is in premise
Please give us the detailed working and lowest quotes