Hi Pete,Just my two cents, a co-worker just purchased a 4-Plex in the City of Auburn about a 30-40 minute drive out of Seattle.

If your rule is, say, that all tenants must have 2 years worth of rental history and have a 600 credit score, then you could require a co-signer.

I had 2 years of w-2 income and the money needed, so I didn't even need a co-signer.

It is my understanding (from a close friend insurance agent) that the "additional" insured is like a co-insured in that you are notified when a policy is cancelled, or not paid.

Well, let me tell you what happened.My partner & I signed a listing agreement with this realtor but before it was signed, property was being sold by owner offering realtors a co-broker 3%.

Apply but you may need a co-signer.

However I also transfer money from my personal checking account to this same savings account (saving money for investments).Is this a co-mingling of funds as it pertains to the business?  

Having a co-borrower will help, and may be the route you have to take in this instance. 

Sometime in the future, I hope to acquire investment property, but for now, I'm acting as a CO licensed real estate broker to help my Denver area investment clients find their "diamonds in the rough."

I called the mother and put her on notice that as a co-signer of the lease she is also responsible for any damage caused by her daughter or her guests and made sure she was aware that we were ending the tenancy.