My business partner and I have decided that we are willing to invest $6,000 USD into a mining rig(s). Below are the things we are hoping for and wondering if anyone has any tutorials that can help us accomplish our goals:

1. We want a ROI in 100 days
2. We want a decent resell value on the cards if/when we need to sell them
3. We already have 1 EVGA 1080 TI card and would like to be able to use it in the build.

Thank you for your help.
 

I received an old wallet backup from a friend who asked me to help them recover the wallet.

I was expecting it to be a wallet.dat file but the name of the file is simply "Bitcoin Wallet backup" and there is not an assigned file type.

I am not sure where to start. Any suggestions would be greatly appreciated.