Looking for success stories or other experiences , positive or negative, range of costs, etc.

It's pretty much why I'm putting myself out there on here, which to gain insight on other's experiences with working a dual agent deal.

Have others used them and had a positive experience?

Ask how many units they manage and how much experience they have.

It can work if you have experience and a local team to help.  

At the very least you will want to have some general foundations set because with time you will modify processes and the learnings via experience you gain.

Quote from @John Williams: Has anyone been on the lender side of private money and had a bad experience that they are willing to share?

I recall looking up their LLC in Florida, even though some documents mentioned California.If you’ve had any interactions with these people, please reply below and let us know your experience.

From my experience, you can use that savings to house hack with an FHA loan, invest in a turnkey property in a more affordable market, or even partner with others to expand your purchasing power.

I will be quick to admit I have only had experiences with small rentals (6 units and smaller) so if you are looking for help on larger apartment complexes I would not be a great resource.