Your question is Planning With Deadline, No Budget. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Imagine a Robots and Pencils client presents a project with a fixed deadline but has not defined a clear budget; how do you construct a project plan that mitigates financial risk while keeping the project on track?