Yes, you can elect up to a certain amount for sec 179 without creating a loss. 

The granite is fine, but the limestone gets ate away from underground rivers (cracks in the subterranean rock) and eventually the weight of the earth above it will cave it in.

Having more units helps mitigate vacancy losses and are generally more efficient to operate. 

Yes, you can sue them for breach of contract and potentially your losses associated with this breach.

If your P&I payment is almost 1300, and you collected 1500 for rent, at $100 for insurance, $100 for taxes, $75 for vacancy loss, and $75 for mainantence this deal cash flows negative $150 each month.

You have a couple of long-term rentals with mortgages, and they already show a net loss with the "slow" depreciation.

What part of proceeds to suspended losses offset?

In order for me to drop it to something that would be affordable to the middle of the pack I'd be looking at several hundred in loss per month.

They had counter weights to keep them up, and most of the ropes that were connected to the counter weights had rotted and failed, so the windows usually had a stick or a book holding them open.

Investing $50k for 5 years holds weight but so too does active management of the property for 5 years.