As you read these books, watch the BiggerPockets podcasts.

To avoid the risk management/insurance that comes with tenants' wood fire use:I'm thinking to seal the chimney cap on roof and run a cord putting an electric Infrared heater fireplace in there, so they can still open the glass and get heat and watch TV over the mantle, but can't burn anything or have any flame.

There are some people out there doing this unethically and being watched.  

Chris,It would be an honor mate.Let me know when and where and I'll be there.Croatia vs Italy starting soon so gotta watch that since I spent a large part of my life in Croatia and all of my family is still there.Forza Italia hahaps.

I never buy into these just watch and learn that is it.

What other data should I be watching?

.- Most contractors will cut corners, or worse, once they figure out they won't be watched closely:( Your job will also go to the bottom of their priority list.Monitoring progress is relatively easy: hire that same inspector to go by weekly or before any payments to take a VIDEO of:1) What was done2) Quality of workmanshipOne other thing you didn't ask about, payments to contractors.- They all want 50% down or as much as they can squeeze out of you. 

Hang out at the jobsite as much as possible, watch and listen, learn from your subs.

As you read these books, watch the BiggerPockets Rookie podcasts.

You can also watch lots of in depth educational videos for SDIRA's/Solo 401ks on his website.