Hi,
I have gone through your requirements and i believe i will be able to help you out.
I have worked and still do work in pre-sales as part of my regular job, hence proposal writing is something i do as a routine.
I have quoted my best hourly rate possible, $5/hr. I will be able to work 40 hours per week- 6 hours on weekdays and 5 hours on weekends (saturday & sunday). If needed i can change the work schedule to accomodate more time for wekdays, but it can only be extended during night hours IST.
I can also be available from 9 am to 9 pm IST either on skype, hangouts, or in freelancer; in case a client requires response .
I hope you consider this and revert back.
Regards,
Afiz Aboo