Vtiger CRM setup

Hi there. We want to set up the Vtiger CRM on our own server using the open source option. In the workflow attached, the "ringless voicemail" is provided by OpenVBX (open API) -- we will need that integrated to trigger a ringless voicemail when the lead hits that stage in the workflow. Also, I used Amazon SES with EasySendyPro to send emails, I want to use this server to send "Prospect Email 1", etc. So that server needs to be integrated. P.s. The workflow in the PDF attached starts at "Import Lead" in blue. Please give me a rough estimate of how much this job will cost. PM for the PDF attachment