We used a battery powered sawzall type tool to cut out our one piece tub and there was no sheetrock behind it.

FYI, Inspectors are a pain to deal with, but they are there to make sure contractors are not taking short cuts. 

Lower the price, perhaps put up higher sound proofing fencing to cut down the noise, and dump this.FYI, I never buy homes on major streets, near railroad tracks, in airport flight paths, or any other major deturant to buyers.

Personally, 9 out of 10 times that I have tried to cut corners (as you put it yourself "sloth" being the main reasoning not to tear out), I have wound up having to fix the corner that was cut along with all of the unintended results of cutting said corner.  

My brokerage wants a cut of my assignment fees from my wholesaling business.....

Don't cut corners, it may save you a few dollars in the short term, but you will be wishing you spent them when your prop is still on the market at day 60!

When I look at others work and notice they skipped two coats on the corners/cuts or didn't use primer I get annoyed but I guess I don't have to live with it.

If you cut out the bank and just use an attorney the closing costs are drastically reduced.

You are in a competitive market, so good luck ... but the good news is that supply and demand cuts both ways: that which is hard to buy is easy to sell or rent and tends to appreciate well over the long term.

If a resident pays after the cut off: 1 - It won't allow them to not pay the late fee, 2 - I can "blame" the software if they complain about it.