What directory are you trying to execute the "cargo run" command from? Based on that error, it seems like you are not in the "electrs" directory, but in your home directory. 
After cloning the electrs git, you need to "cd electrs" before you do the "cargo build" and then "cargo run" commands
Touch down, again. I just entered the command in electrs dir and it started building.After cloning the electrs git, you need to "cd electrs" before you do the "cargo build" and then "cargo run" commands
Question... will electrs download/build its own DB now? I guess yes, but will that be about 20-30% of the bitcoin DB?
Also, how about WLS moving it to another PC? is this possible?
Thank you again HCP, will update here with progress and more info, we can all share. Your assistance is great so far.