Hello all, I have been contemplating how to add ac to a 1980 jayco j-flight 6. The camper is in awesome condition for its age and I would really like to keep it. I would like to avoid any hacking into the sides of camper if possible. Plus space is at a premium in this unit, So window unit is out. There seems to be mixed reviews on weather a portable ac with a vent would do the job. Not to mention the extra cost. I know this may be a bit much, but could I make the roof be able to support a roof top unit? I have already upgraded the service to 30A, so power would not be a problem. My concern would be the roof and the cable system being able to support the extra weight. If they could be beefed up so to speak, then I would like to pursue this route. Can this be done? Or is this just a pipe dream?