We do basically the same thing in my environment.

1) Copy file to DEV server - I don't trust network connections during the restore, no one seems to handle them well

2) Put existing DB into SINGLE_USER mode (error is thrown if the DB doesn't exist yet because I haven't added the 'if' statement)

3) Restore all _Data and _Log files contained within the backup - This allows the same script/SP to be used on many DBs with only a few variables getting changed.

I kept the file copy and everything else contained within the T-SQL code to make it more portable and easier to replicate at new sites. Also, I fair amount of output via PRINT which I log to a file via the SQL Job Agent, that is just a personal preference.