hi,
I'm not a Robot and just biding $250 at a minimum ( just not to disturb your avg bid),
but the actual cost of the system will be around $1100-$1200,
if you just need the users to access IVR from Asterisk, I would recommend using AMI and simple media streaming to give users ability to choose the menus,
if they want to transfer the call to some other phone that can be done via AMI,
kindly let me know if we can discuss the project in detail,
regards,