Property management is a pretty broad field--kinda like asking what people that work at a large corporation do. Depends on what type of position you're looking for.
I worked at a property management company in Steamboat for several years doing admin work for the maintenance department. Pretty dull work, but it was full time unlike a lot of the jobs there. It paid around $15 to $17.50 while I worked there, which wasn't too bad at the time. That figure was pretty steady for non-management positions in the department, except for some of the skilled/long-term maintenance guys that made between $20 and $30.
Downside was it was a day job, so I didn't get to go snowboarding quite as much as I would have liked--especially in the record-breaking winter of '08 when I spent morning after morning shoveling two feet of snow and not nearly as much time riding it. Upside was it was super laid back in the spring and fall--there were days that I spent doing literally no work.
The company managed the rental side of condos and townhomes that were privately owned. There were all kinds of positions such as front desk, concierge, marketing, owner liaisons, etc., but many were seasonal. I'd say outside of the top general managers pulling in $80 to $90K, most positions were pretty underpaid. I applied for the maintenance manager position, which was offering around $40 to $45K, salary. Watching the guy that got it made me thankful I didn't. He worked long hours, was on-call all the time anytime (including emergencies in the middle of the night or weekend) and really had way too much responsibility for that kind of pay.
All that being said, things went to the shitter right after I left in summer '08, so not sure what the landscape is like now. A lot of my friends moved out of town too, due to poor economy.