I think this is a very noble and interesting undertaking.

In today's (and for a long time) lending enviroment you should expect to sign personally on the debt unless to are putting upwards of 40% or more down and working with a local bank who undertakes your business and properties.

A mentor isn't going to take on a mentee unless he is near certain that the mentee can succeed in whatever it is they're undertaking.

I'd agree inspecting each unit and mains on the property before undertaking the metering.

I see this as a big undertaking, it's not about trashing any book, if one is really looking like it's outdated or has some poor suggestion, I'll mention those or may not even mention them.

I don't understand why you don't undertake the rehab yourself?

Certainly, doing additions are a big undertaking, and if you don't have the experience/team/confidence to do it, it doesn't really matter what the math says.That said, if a great deal comes along, perhaps it's a good opportunity to find an experienced rehabber to team up with to take the lead.

What newbie resources would you point me to if I undertake this?

A little inconvenient but my renters pay almost my whole mortgage, they are redecorating, replacing doors, repairing counters and cabinets, painting, etc. for a $100/month discount on rent.

Bad - No significant appreciation which makes undertaking large projects/maintenance for a historic home a potential large money pit as @Steve Santacroce mentioned.