We are a team of 3, so the project gets done with testing in a20 days (50 man-days). You can pay 20% in advance & the rest only after we deliver! If you are not happy with the work, even the 20% is refunded. We are a company & not a free-lance individual. Would that help you to decide? Have a wonderful day, Kiran P.S. We will look at USD 1700 for this work.