Greetings! We'll be buying a LM Pinehurst this summer and I'm undecided about whether or not to order the built-in generator. The literature lists the option as a 5.5 kw Onan LP generator. Does that mean it runs only on LP, or does it also run on gasoline? I'm assuming it's a matter of pushing a button inside to start it? That sure seems more convenient than dealing with a separate generator outside or in the truck bed. Another matter is the price. It's a $5,000 option. Is it feasible to order just the gen prep and have the same type of generator installed independently? And what are other brand options? Any opinions or advice about this subject would be appreciated. Thanks. Jim & Dee