Absent the DTI "immediate credit" he may not qualify for a new loan for the size of home he seeks inside of the 9-12 months after he sells.

If you find someone giving you confused looks, seek a mortgage broker that helps investors.I'm not so sure how they would calculate income from short-term rentals.  

I am looking for a RE financor/investor to lend me the amounted fix money we agree to buy the property for, and in exchange I will pay the investor a 6.3% interest by distributing monthly passive income to them in a duration of 15 years.Using the deal that I currently am seeking for now, This Fourplex is listed for $459,900. i plan to negiociate down to AT MOST $409,900 (50K less than asking price).

A well connected agent can also tap into their network.. for instance, probate attorneys might know of people seeking short-term solutions.

Is it something you're seeking or looking forward to joining? 

I’m A 11th Grader And I’m Committed To Being A Young Real Estate Investor After HighSchool...Just Trying To Seek Advice

Readers should seek professional advice.

This is where the lender and original owner seek the investigation by the A.G., FTC, HUD and others and the FBI does actually get involved to see if there is a pattern.   

You're taking a great first step by joining this group and seeking guidance.

This has led me to seeking equity partners.