Newer updates including a steel roof, metal siding, furnace, hot water heater, some windows, and appliances all within 2-4 years.

I also distribute metal pens with my advertising on it. 

@Maugno M.I just installed a colored metal roof, 40 year 'warranty'.

IF (big IF) the boxes holding the 2-prong outlets are metal, AND the lines coming into the boxes are BX (metal shielded) you should be able to ground right to the box, and change the outlets to 3-prong (with ground).  

I was curious if any of you have had experience with owning and renting out metal houses.

The tenant also wants a metal gate installed for protection. 

In any case, I found the following after she moved out:- Smoke/animal smell throughout the unit (she was a smoker and smoking in the unit was strictly prohibited and dog was allowed per the lease)- Carpet with cigarette burns and soaking wet at the time of removal (no telling how long its been like this)- Rear window has a broken pane (still functional as it is a double pane, but needs to be replaced regardless)- Holes in drywall- Replaced bedroom doorknob with deadbolt (because her middle school son was stealing cigarettes lol)- Backyard full of metal/wood fragments and general rubbish including shoes, a knife, batteries, fishing reels etc. 

After digging I found the code, apparently it is required: R1003.9.1 Chimney CapsMasonry chimneys shall have a concrete, metal or stone cap, a drip edge and a caulked bond break around any flue liners in accordance with ASTM C 1283.

Why not consider a metal roof?  

The owner put an addition( w/heat/air )Because it still has the metal frame banks, conventional/fha .