Need help creating new version of a game from Source Code

Project Budget (USD)

Project Description:
We will be purchasing the source code to a game and need to change up some of the things in our version of the Game (colors, templates, etc..). We would also like to build in a couple 3rd party SDK's.

How much time do you think this would take if we provided you the Source Code? Let me know your thoughts on the the total rate as well.

Thank you,

Skills required:
Project offered by: