Re: 6 point plan?
...what's a budget?
The best way to answer that question is to Explain it like this....
Consider how long it will take you to analyse requirements for the job. Then consider how long it would take to design and implement a solution to meet those requirements. You should also think about how long it would take to design and develop a test plan to verify that the solution worked as expected. Now think about how long it would take to execute the solution and run all your test cases.
Each resource - designers, developers, testers, etc. will each have a daily (or hourly) cost associated with them. Do some maths to work out how much it'll cost you for the resources to spend however much time you estimated. Then factor in a modest percentage uplift to cover risk mitigation, etc.
Finally, think about the physical resources you will need to support your efforts - things like hardware, software, tools and the like - and work out how much it will cost to procure those.
Add all of those together and you come up with a number....
...then knock a couple of zeroes off the end, and that will be the budget that you're given.