I've completely replaced music with BP podcast on my commute to work, there's so much to learn from them and little time.

I won't get nearly as good as ROI though because I bought the pool home for 101K in 2012 and there is no way to replace it for that little unless a bargain falls in my lap.

Roof replacement, HVAC system replacements, etc

I'm thinking of replacing it with a 1990 or newer model. 

I'm thinking of replacing it with a 1990 or newer model. 

Do anything significant - structural, windows, roof, electrical, plumbing, or HVAC - and you'll need permits.Check out J Scott's Book on Flipping Houses.

I'm looking at a long, skinny rowhouse that's currently configured as a 2 unit, but could probably be reconfigured for three units for either rental or condo conversion.Several of the existing bedrooms have their only window into a shaft that I'm pretty sure was put there explicitly for the purpose of allowing light into the house.  

Online is great to a degree but it will never replace face-to-face.

When you insure the house you would insure it for the value of it to be replaced. 

If all goes well, we'll be able to purchase one more (for a total of 4) by year end.Currently I work at a large technology corporation in the area and my 10 year goal is to replace my current income with rental properties.