He runs the Northern Worcester County Landlord Assn, you might want to look into that.We are also planning a landlord panel discussion at our Worcester Black Diamond meetings (url in my signture) sometime this spring, so you might want to sign up for our email list to be notified.

The floors on the utilities side (where electrical panel, washer/dryer is) is unfinished concrete so we painted that and all the walls with an exterior type paint/primer.

It is similar to laminate because it comes in rectangular panels and the pieces stick together with overlapping sides that have a stick strip on them.

Not mobile home type pre-fab but where they panelize the house in a shop and then truck it to site either in panelized walls or even in pre-assembled rooms/floors.

Anyone have any good insurers to recommend for knob and tube with a combo Romex panel for each unit in a duplex?

In addition to the code requirements that Sherief mentioned (ceiling height, egress, as well as heat sources and electrical panel locations) you'll want to see if land use and zoning match up with the properties current use. 

Try Seattle Investors Club or SIC, @Julie Clark is a wealth of knowledge and great ambassador for the area.Additionally we have our monthly meetups in bellevue, WA as well as  @Michael Haas with his house hack meetup which usually has great topics, networking, surprise panels of experts sharing great tips, strategies, and ideas.REAPS - real estate association of puget sound - @Angelique Tinney has great panels, monthly meetups in Bellevue, WA and across the sound too.Most of us are local PNW seattle investors and can help coordinate that transition from dade/miami/broward counties.Both FL and WA are no income tax states with relatively low property taxes from what I've seen.

No more leaks and the light that comes through the new panels is amazing.

When you change single family to duplex, you may need to make some changes like separate electrical panels, separate heating systems, .....

Check the electrical panel.