Hello,
I'm a native speaker and a professional freelance writer. I have recently written two proposals, which I'll send you in a private message. One of them was a proposal to conduct a health survey in the UK, written for an epidemiology student, and the other was for the city council in Grafton, New South Wales, Australia, with regards to building a bridge in the area. I can ensure that your proposal is well researched and professionally written. The price depends completely on the amount of work and research required, but $40 is an approximate price for 2/3 hours work.
Let me know,
Conor