Has our fast food culture put too much of a strain on old plumbing systems?

My son is headed to Brooklyn in August to continue medical school clinical rotations at Kings County hospital.  

I have been very successful in obtaining renter's on job rotations for 5-7 years and can easily afford my properties.

Not sure I have the name exactly correct.What they do is help you get intro zero interest credit cards and rotate the balances.  

I  use electronic keypad and rotate combinations between guest stays, then change them about once a quarter. 

One ladder at one side of the room, the other ladder at the other side of the room, and the walk board between the two.Takes a minute extra time to set up for each room (Rotate the whole assembly on right angles as you move around the room), but when doing cut in at a ceiling it beats the pants off the old grind of "Paint 3 feet, climb down, move the ladder, climb up, pant 3 feet... wash, rinse, repeat"(Of course, I'd rather have stilts, but not everybody will invest that kind of money in tools)This is a sturdy setup that will cost maybe a hundred bucks at maximum (No need to buy really expensive ladders to do this), and will save you a ton of time... especially in hallways!

This is what causes the motors to break - they are just over worked.Furthermore, the electricity that it takes to run the fan exceeds the energy that you save from cooling the attic - again, regional differences may occur, but this is at least true in the south - see this study done in Florida:http://www.fsec.ucf.edu/en/publications/html/FSEC-GP-171-00/You do get benefit of reducing strain on the HVAC system and ductwork if it is in the attic, so even though you are spending more on electricity, reducing the temperature in your attic is important because this will increase the longevity of your HVAC system (if it is in the attic).So, the conclusion is that for energy savings, solar powered attic fans are superior.

I have them on all my proerties and have about 12 key combos I rotate.

In fact I've recently invested in a subsidiary to a publicly traded company in Colorado that's in the biz of building 100,000sf totally environmentally controlled greenhouses that rotate the crops that grow in them 4 times a year at half the cost which will result in a significant savings over all to the end user as long as the middle men aren't greedy and willing to pass it along.In fact aside from the greenhouse investment I'm only intereted in commercial/retail type real estate that could be leased/rented to MJ retail/despensary operations with NNN potential.

I've been told to not over lubricate or you cause the wheels to not rotate and causing a lot of strain on the pulley...not sure how true this is.