Hi,
This is initial bid in order to show my interest in your project and the budget isn't final. Can you please send me more details so that I can check and estimate budget as well as we can fix a deadline?
Regarding my offer, I have been providing architecture and engineering services to world wide clients for more than 10 years, and only on this website I have completed more than 500 projects successfully. Thus you will be in reliable hands to get high quality results.
Thank you