After 3 years of ownership, their cash flow has tripled. 

Some assets purchased have doubled and tripled in value.

How about adding to your list:  Offer everyone triple the market value and end up with a three very angry owners remaining who think up all kinds of schemes and lawsuits.

I've seen some properties triple the past few years.

Management fees start at 15% and don't offer much but managing your reservations and hand you a phone book with cleaners, maintenance people- you deal with those...So far I do everything my self and hire out cheapest tasks like mowing, some yard work and some cleanings when doubled up or tripled up.Regulations will possibly take affect this fall and limit the amount of STR's in Bar Harbor.Things to consider:Properties are muuuuuch more expensive than your average market...Lately for sale properties last less than a month on the market and get bought with cash offers...If you see a property for 300$k is likely close to full gut remodel or tiny house with no land.Taxes are high!

https://cozy.co/blog/can-landlords-charge-tenants-for-carpet-damage/#:~:text=Carpets%20have%20a%20life%20expectancy,landlord%20expects%20to%20replace%20it.I would contact an attorney because you might get sued for triple damages, especially since you don't have before and after pictures.

Businesses flow in and people renovate the houses back to their former glory.If you know what to look for you can get a triple equity boost - the fixer-upper return/basic appreciation/gentrification bonus....

However, it would have to come with some pretty significant upside, like double or triple the profits of my normal cash flow on that unit, a large deposit for the extra wear and tear, a long term lease with annual built in increases.

Triple net lease operating convenience store, worth $600k.

You can find a good PM on here through referrals, I would never go with someone that says they can help without triple vetting them.