A sophisticated investor will also typically ask for the entire claimed track record and then run it through the wringer.

I agree that you can use a Realtor with a proven track record. 

The accountant would record it as of Jan and not Dec. 90% of the real estate investors are running cash-basis.

Consider connecting with local REI meetups, hospitality groups, or even online forums like this one to find like-minded investors.You could also pitch your successful track record to potential equity partners.

We intake county record updates daily.

None were a match for me personally and many were not a strategy I wanted or too speculative (such as opportunistic strategy which is the riskiest strategy or investing in tertiary markets which also tend to be the first to go belly up when there is trouble etc).You probably actually want to look at your operating agreement to see what rights you have to books and records, etc. 

So investors want someone with a long track record of reliable and risk adjusted returns.

I do a lot of searching through the MLS and county records, and come across these fairly often, but am curious as to who/what they are.

When you have a proven track record of performance, then you can play with other people's money. 

It is usually used in conjunction with decoupling clips and the like for listening rooms, audio recording rooms and home theaters.