Write a program for backup saves in the Steam

Good afternoon! Programmer services are required. You need to create a program that:
- Will search for games installed in the Steam (by the presence of such files appmanifest_332360.acf on the hard drive). Each file = 1 game)
If the program found the game, information about it appears in the application. (Title, poster, way to save, go to steam)
- (?) Workshop support to add game information to users themselves.
- The ide of the game in the program must coincide with the id of the game in the Steam
- Ability to archive saves from selected games. (Back and hot key)
- Auto archive after the game was closed.
- The ability to specify the location of the game manually by the user.
- The ability to recover saves from selected games.

I have a prototype that I have written, if necessary, I can provide. Written in Visual Studio 2015.
I'm gonna need the source code, not the final app.
Please indicate the time and prices.