Very wealthy people carrying a lot of baggage is not unusual nor very rare. I knew of one couple that had a second aircraft, just to carry the luggage and the maid of the owner's wife, on about every trip.
They used a Sabre 65 to carry themselves and their four dogs, with a Sabre 40 that left first* going to their destination and they followed in the 65. The home bound flight was just the opposite. They would leave first in the 65, followed later by the 40, full of the luggage, the maid, plus anything they might have bought.
They did this for years.
So a lot luggage with just one passenger on a business jet, not unusual.
* She wanted her clothes unpacked and sorted before she arrived.