In fact anytime I have a property with a metal roof I put solar on because the pay off is about 10years but it increases resale value and I can charge tenants extra for the environmental good they feel.

I would recommend having coils cleaned, refrigerant charged to spec, proper safeties installed (and working) such as high pressure switches and float switch.

I like metal roofs but they're not a panacea.

Metal is more expensive but longer lasting.

A few dollars worth of metal strips can save you literally thousands and thousands of dollars in insurance.

In Florida, our insurance premium with a new construction metal roof is $700 a year.

My fire was started on an inside wall from a fireplace being over-used and a leak in the metal chimney.

Until around 1982 - pipes were commonly cast iron or a related metal. 

Unless you have a metal or slate roof.A/C lasts 12-15 years.Garbage disposal lasts 5 years.Instead you could take your million dollar gain now, pay $150K in taxes (I know that it hurts like hell to write that check because I once wrote one for about 1/2 of it, plus another 9% to the state of CA), spread that money over 5 or 6 mutual funds and sleep well at night.Or invest in some commercial land/enterprises; car wash looks interesting.Good luck.all cash

I bend a metal gutter grid.