We are experienced but starting up a new company. We are offering you 40 hours absolutely FRREE of cost. (i.e. 5 working days)
Chances are that this project will be finished in 10-15 days. For additional hours, we'll charge you a very minimum cost of $10 per hour. If the project finishes in 15 days the maximum cost we will charge is $800. It is very unlikely that we'd drag it to 15 days. As a startup, we are doing it only for good reviews and we'll try to finish the project in that initial FREE 40 hours time.
Best Regards