Although they compared it unfavoribly to a duplex next to us that I consider not as nice as ours.  

the internet has changed this a lot compared to what it used to be ..

I'm interested in that area and wondered how you found the rental market as compared to the vacation rental market?

I would try to compare what updates those houses had to what you house looks like.

The shift will begin at some point when my cash flow is comparable.

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?