They are pro coal which means they are anti natural gas.

Honestly, I've never read a bad real estate investing book.I wish I had started with your age and the amount of money you can set aside.

I am happily married and have two great children ages 8 and 10.

The plus is that there's no work involved, no taxes when withdrawn after age 59 1/2, no tenants calling with problems, not having to wonder if the rent payment is coming, maintenance costs, mortgage, this list is very long.

@Brian Alterman   Many of the commercial lists are competitive and many are filled with aged data.  

Our insurer is progressively adopting a policy that they will not cover water damage  caused by water heaters of 12 years of age or older.Still, the alarms work and I have avoided damage because of them.

That's better than 98% of people your age!

The age/maturity of the tenants and the fact their parents or grandparents are typically guarantors are undoubtedly factors at play here.When we are in acquisition mode  or refinancing properties, lenders prefer annual or term leases to a month-2-month lease.  

2, What is the age of the house?

In the hotel business, the rehab and sell method has been around for ages, but the difference is that it takes years.