Perforated vinyl will absolutely work with a friction fed plotter, it's just unnecessary if you can get unpunched. For a sprocket fed plotter, you can only use punched vinyl.
Oracal 651 is good for short term use outdoors. I personally only use it for interior projects. You really should always spend a little more money for a premium cast vinyl - Oracal 751 or 851, FDC 2100, 3M 7725,
Gregory TrendFilm, etc.
It's worth the extra money you spend on the right vinyl to insure you give your client the best they can get. You hurt yourself if you use cheaper vinyl based solely on cost to you.