Probably a good idea to get some legal advice from an attorney to guide you through the steps. 

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If I can't be of immediate help, I'm happy to discuss and try to guide you in the best direction and help that way.

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Can anyone guide me on a step by step approach to starting a mortgage note exchange business ??

My uncle is a realtor with multiple offices and a title and management company so he’d be managing the rentals, and guiding me as I search for the rentals.

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There are tons and tons of resources out there to help guide you in the right direction.

You can use their figures in Opex and CapEx as a guide but don't assume it will be the same when you are operating the asset.

@Adrian Beltran This questions is often asked in the forums... here is a "choose your own adventure" type guide to help you make the best decision for you.