Probably on a lower scale to what you're enquiring about, but own a 4 metre RIB with 30HP engine.
It is my first boat and a perfect entry level set up. It's on a trailer and can be launced and taken out solo. It is perfect for lake and sea and offers a good sense of security due to 3 seperate buoyant pockets on the inflated ring.
Wasn't very anxious about buying, as RIB's hold a good re-sale and I did buy secondhand.
Can't think of any non-obvious cons, but do know someone for whom shared ownership was a disaster relating to treatment, maintenance and care.