Arlington county has relaxed its standards for accessory dwelling units (https://housing.arlingtonva.us/plans-reports/accessory-dwelling-ordinance-update/).

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The main thing I would add is to link up with a local friend or future co-worker who knows the area well and has been living there.

I know Oregon does not really require CO's for rental properties.. but back east its a big deal in many cities and they have inspectors for this stuff.. 

Found a couple of REALLY distressed properties in Colorado soon to be under contract. 

@Mindy Jensen, what $30K in CO?!

Have you considered a co-signer on the mortgage?  

The bad news is that your idea has a few major flaws besides the fact that you absolutely must disclosure your intent to any landlord according to the 2020 IL TLRO Tenant Landlord Residential Lease Ordinance - the most obvious of which is that you are leaving yourself as an individual open to enormous personal liability.

For instance i had a townhouse up by the zoo.. mult co one side of the street I was in WA county.. and i KNow i saved on taxs

I want to establish solid real estate connections and provide value to each other. Everyone is welcome.