The gas furnace isnt a problem , there is a flame in the furnace , Unless there is a gas leak thats not a problem . the ventilation is the key , I weld in a 36 by 40 garage with 14 foot ceilings and I have to keep the door open and a fan running while arc welding .

Put a big exhaust fan in the nearest window.  

Not a big fan of Wikipedia but their definition and background of the past industry in the Rust Belt is decent.

. $30 labor to replace a light fixture, $20 for a light, $50 for a ceiling fan light, $100 for the fixture itself or $150 depending on how nice it is, laminate install labor $2/sq ft, laminate $1 to $2.50 sq ft depending on the finish you want).The more you'll see, the more you'll learn.

I agree - I am a fan of this area.  

., thanks for your reply.I'm overseas, United Kingdom resident, split my time between England and Hungary.

I see you are posting from England.

Outlets have to be moved and I didn't think of that when originally estimating.2) I decided to go with more expensive light fixtures in the bathrooms than originally planned, but they will look nicer.3) I'm going to upgrade the 1970 medicine cabinet in the lower bathroom to a nice framed mirror.4) I'm putting in new bath fans in both bathrooms. 

Glad you are enjoying the podcasts :) I'm a big fan of small multifamily properties, like the one I wrote here: How to Buy a Small MultiFamily Property: A Step by Step Case StudyLet me know if I can help you out at all!

Thanks Karen(big fan)!