"Out of 86 guests, I've only had problems with 15 guests."
"only"? n.b.: If your business model is renting out luxury condos to people on the Internet, you're going to have a bad time. People will use them for parties.
Las Vegas hotels are staffed around the clock, owned by large companies with paid staff. In the event of damages or unruly behavior, they can kick someone out or have them arrested in short order. AirBnB listings tend be owned by individuals or families, and are often rented when those owners are absent. I can't imagine a security deposit in such a situation of less than 10% of the property's value.
There are ways to deal with potential issues, ie. security deposits