Howdy Caasix, welcome.
For the legal stuff, should go to state DMV web site. Straight from the horse's mouth sorta deal.
LOL, we actually have a no flaming rule and really are some great and kind folks here.
For bicycle consideration; http://motorbicycling.com/forumdisplay.php?f=31
MPG and MPH will vary greatly due to engine choice and ridding style.
Looking forward to seeing your build. Have fun and ride safe!