Generator vs Inverter opinions

[bagpipes6]

Looking for opinions on the benefits of the Onan 5500 Marquis Gold generator vs the Xantrex 3000 watt inverter. I plan to fulltime and will most always be at a site that has hookups. But not knowing what can happen during the years with different circumstances of some dry camping, power outages, etc., what would you select between the two systems? What are your experiences and opinions on this subject.

Also, I was told from a rv service tech. that putting a ladder and roof rack can definitely lead to water and wear problems down the road. The weight of climbing on the ladder eventually wears on the screws and enlarges the holes to allow water entry into the rig even with resealing. Any thoughts on this??

Thank you in advance. John