They can take care of a lot of the monotonous tasks, and even do things like send leases, screen tenants, add rent charges, pay utility bills, the list goes on. 

Signs of this are poor lease quality, maybe M2M tenants, high expenses (unnecessary things like high trash bills, internet, cleaning, security).

Strong property management and careful tenant placement also play a critical role in success here, so I recommend partnering with a turnkey company or an agent who specializes in these areas to make the process smoother.As for rental demand, homes that sit for extended periods are often the result of issues like pricing, condition, or tenant quality—not necessarily a reflection of the market as a whole.

Better to have your own property manager use trusted handymen to take care of the issues for long term/quality fixes. 

Use individual leases to reduce risk, screen tenants carefully, and set clear rules about noise and responsibilities.Good luck!

@Marc ShinLike @Andrew Steffens said, for big items, go with quality.

You might want to read our series about “How to Screen a PMC Better than a Tenant”, since selecting the wrong PMC is usually more harmful than selecting a bad tenant: https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processes

As "proof" that they are legit, they sent me a copy of a DE vorp good standing screen shot and a fake HUD statement showing $1.2 million on a property that was sold for $200k three years ago.

I can refute your reputation, I can refute you who you fundraise from, I cannot refute a truly quality deal.

I even took a screen shot of it somewhere.