Re: 40 miles per day?
We, the members of the DAR, Denver Area Riders regularly do 60 and 70 mile cruises. No reason to think you can't do it. Take your time, set the bike up properly with attention to details and you can build a reliable bike that will provide you with many miles of fun transportation. Do some reading here to see what it takes to build reliability into your bike. Have fun, ride safe.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"