Hello,
Thanks for inviting to bid for your project.
After carefully going through the requirements, it's very clear that you need professional team of developers to implement your application.
We believe with the experience which we have in developing IMs, we are capable of doing your application.
Now, the budget is not enough at all for a professional job like this, thus we have mentioned what we would like to charge for this for your consideration.
Please be kind enough to get back to us with your thoughts.
Regards,
Ransika De Silva