It will require more man hours of work and that too top level talent. and since top level talent does not sit empty-handed anywhere in the world, the project is going to cost much more than what you have outlined.
If someone bids lower to get a project, it is ultimately going to cause a lot of pain and trouble.
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We don't think the kind of project you have asked for can be finished in the budget you have outlined.
We have developed many such projects. Please don’t go by bid price here, because this kind of project needs quite a lot of thoughtful consideration, detailed planning and work, back and forth feedback between us and the clients, testing and implementation.
The quality and delivering in promised time limit is the main thing.