I'm a total newb, but I believe MLS-access in MO is controlled by your local Board and NAR.  

A few local investors I talk to say it is normal (for them), but I am looking for other input as well. 

Let me know your favorite ways to do a deal like this.Property is currently not listed on the MLS and it's owned by another local investor / contractor.Let me know your thoughts?

How do you ensure that properties comply with local regulations and ordinances?

When commercial lenders are evaluating a first-time CRE investor, they like when the sponsor is within driving distance of their first investment, so pat-on-the-back for staying local on deal one, it makes it a more prudent transaction for all involved. 

Also, if there is room for an ADU renovation, with the new laws, someone is going to pay more and put more units back there if they can.

Are you attending any local REIA's/networking events?

Personally, I think even at our forever home we would like to have an in-laws suite, separated basement, or an ADU of some sort to house our parents. 

He invests himself, specializes in investment properties and has a great pulse in the local real estate market.

I too am a local here in South Florida.