Would this be a percentage that I would compare or more of a ball park difference between properties?

Hello BP, so appreciation in condos is slower compare to a single house & it is true in my areas but because of the limitation in purchasing other type of properties, i had very little choice if i want to do a syndication on multi family units. 

How does yours really compare?"

Also, commercial buildings are more likely to be valued by the income they generate and not as heavily influenced by comparable sales.

Do you have comparable sales and rentals to assess what value should be?

Though I am not entirely experienced in this subject, I recall from some of the podcasts that larger banks like BoA can sometimes offer lower interest rates on their products under certain circumstances compared to a smaller bank or portfolio lender. 

I'm a energetic honest straight forward investor.

The house is in comparable condition.I'm aware a lease is not a sale, that I could/should record a long term lease (beyond 3 years), but perhaps I could structure the deal first as a 3 year deal then with the option both to renew or purchase at the completion of that term.

I live about an hour south of Pittsburgh, so real estate here is pretty cheap compared to other places. 

I spend a lot of time looking at comparable properties, market trends, demand, sales volume, etc..., before I invest in anything.