@Chris SeveneyRight, Its basically impossible to know for sure the "extra" cost - unless we bring is some kind of engineer -  which is total overkill. 

I am in Orange County, California, and a 4-unit in Newport Beach with one unit being a 3/2 for example LTR would not bring in 7K gross income on that unit.

I bring this up because it’s identical to the amount you have.

Partner with an Experienced Builder – Bringing in a partner with a track record of SFR development could help meet lender requirements. 3.

This is more for people who don't plan on selling that home (probably ever) bc of the significant cash flow the unit brings along with the main house.

Yes, I know sometimes sellers bring money to the table to close- based on condition, liens, etc - but as a general rule- this helps. 

For example, if your driveway only fits two cars, you need to know if tenants plan to bring several vehicles, as this could lead to parking violations and HOA fines.Don’t forget to screen pets, too!

You’ll also want to check the FEMA 50% Rule if you plan to renovate, as substantial improvements might require bringing the home up to current flood codes.

I negotiate at 70% ARV so the deals I bring are solid and I'd love to work with one single corporate cash buyer that is able to close  on several deals a month.

I think you bring up a good point of considering offering higher returns to investors if I have to begin to search outside of my network.But my original question from the post still remains, where would you recommend I search for people interested in an opportunity like this?