I can't speak to the validity or longevity of each method.  

I would show her current market rents, but explain that you value her longevity and give her a bit of a break.

My personal feeling is that it was a great product, inexpensive, great longevity and fire resistant.

I would grow at a rate that promotes business longevity.

Profit is what insures a business's longevity – if it doesn't make a profit, it might not be in business in six months.

Thinking about longevity as well.

Although not expected to leave BlackRock anytime soon, Larry Fink has a keen eye for the longevity of his company, and is clearly working hard to promote those who will perpetuate the company’s culture he’s worked so hard to build.

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.

That way you can try to build business credit and longevity for the LLC and (hopefully) register that same LLC name in another state if you move.

I worry about the longevity once they have all the oil they can get.