This tool (no affiliation with BiggerPockets) can help your son find properties with assumable loans. 

It would be far better for you to join NARPM - National Association of Residential Property Managers SE Virginia Chapter and join as an affiliate. 

Most of the large lenders have affiliate programs and will teach you for free to represent them.

Note I have no affiliation with him.

Find one with flexible pricing options, no long term monthly commitments and affiliate referral program.

I have been tweaking pricing periodically and viewing comps to other cabins in the area.Will definitely look into Trip Shock and the affiliate/ partner options. 

They are very up front about the whole process and all the details.Before I go on, I want to make it clear that I am a small time entrepreneur and am in no way affiliated with the Capital Syndicate, Awesome REI or anyone else associated with this course.I bought the Capital Syndicate course because I wanted to see if I could apply it to a specific niche market.I bought all the add ons because I wanted to make sure I gave it every shot to work properly and because they offered a 30 day money back guarantee. 

I never used it and not affiliated with Michael Blank.http://www.themichaelblank.com/syndicated-deal-analyzer/

We are in California, so the Zion affiliate bank company here turned out to be California Bank and Trust. 

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