Those properties that are skyrocketing in value are not the norm. ALso the one from 2015 is over a 7 year period, not a 2-3 year. They may have been tear downs at that point when purchased, so they only paid for the land value. The properties I own, have increased in about 33% value. They may be listed for 50-60% more, but the reality is more like 33% when they're sold. I've been checking every month for about 3 years now, I'm not an expert, but I have some knowledge.
If you find a house on airbnb with poor ratings, I've often found its listed by evolve. People who use evolve are not super involved in their property (why they use evolve) AKA They don't realize their rating is low (4.7 or so). Good properties are 4.8+.
I would strongly recommend you manage it yourself. It's hard, but you'll make more money.
My properties are in the top 5% of listings in the area, the best ones get about 80% In the summer. But they're also huge. You won't find similar statistics with a 2-3 bedroom property, you might find your numbers are better. The dynamics are very different. Fall/spring, just about everyone is getting 30% occupancy.
I also am a little concerned you haven't mentioned the ordinance issues. There has been a lot going on recently - tobyhanna basically just outlawed large houses, and imposed extremely strict fines and requirements on everyone. If you have a noise complaint from a neighbor, you're fined $3000. With a 2 bedroom house you can only host 4 people. It's pretty absurd. Unsure what realtor you have but it makes a huge difference with what they can tell you about which neighborhoods are OK with rentals, and which arent.