The only way to rid the home of the scent of urine is to rip up the flooring and, if soaked into concrete, treat or replace the concrete area.  

Above all things, treat this transaction like a business, since that is what it should be.

This means treating the property you leased as if it's your own. 

You could also use to purchase several properties, pay down credit card debt or treat yourself a nice vacation.

I've been told that my property is treated as an investment property because it's a triplex, but it is my primary residence.

Fair Housing requires us to treat all applicants the same with regards to screening.Does your existing lease specifically allow or exclude the potential for a mid-lease modification like this?

Not that I don't treat my current unit as a business, but if I mismanaged the money on something big, my investors would be all over me.

The biggest pitfall is when a landlord tries to be "nice" - non-paying tenants are literally stealing from you, treat them like the criminals that they are.To calculate reserves for vacancy costs We average about 2-3% vacancy across our portfolio, I use 5% as the number for reserves.

As such your underwriting should treat this as a duplex.I suspect eventually virtually all of Chicago will allow additional units but it could quite a few years.  

Check with your City/County Attorney if you can treat the unit as abandoned.  2.