In addition that they are also carbon monoxide alarms is also beneficial. 

I'm lucky enough to have isolated pockets in town that are carbon copies of each other with no real differences other than the garbage day.I used 1 & 2 to comp my house because I had no choice.

@Kevin Carbon , I've used google voice for mailings and it was great.

You will need smoke detectors and/or carbon monoxideHVAC - How old are the HVACs?

@Kevin Carbon is hosting a meetup tonight down in Lakewood: http://www.meetup.com/PacificNWRealEstate/events/225963371/ and I host one here in the Kirkland Area the first week of November!

If you're looking to transition over to multi-family buy-hold, you'll definitely be in good company and there are a number of investors on the forum whom you could contact about possible joint-venture opportunities or advice.Hope to see you at one of the meet-ups soon, there is one happening in Lakewood tonight at 7:00pm, contact @Kevin Carbon for further details.

As for a meet-up group, I would recommend contacting Tiffany Plovie, @Troy Fisher, and @Kevin Carbon.

The new duplex is almost a carbon copy and I can negotiate $1,800 a month to the owner so will taxes and insurance be included in that?  

I went back and put in carbon monoxide detector and fire extinguisher while they were moving in.  

@Mike Garrison - The meet-up he was referencing is jointly run by @Kevin Carbon and @Troy Fisher and Tiffany Plovie.