Tenant shall not allow any sweepings, rubbish, sand, rags, ashes, bones, grease, or other substances to be thrown or deposited therein.

I would either use a HML spread over multiple deals to rehab or I would find a property with good bones (foundation, and most studs/joists are solid) then buy it for super cheap and force appreciation through the rehab, which is what I do. 

Unless you're charging bare-bones prices, someone will want to control their own comfort.

The homes are reasonably priced for the size and bones, allowing investors to customize homes with renovation or interior design prior to being able to attract guests at the right price.

If that is the approximate time frame, then throw them a bone and move on.If they have been unable to use the bathroom since the water incident because it was declared unhealthful, then it would have been much better to have made an insurance claim. 

The three properties referenced above: a) one turns into a mid-term allowing me to get higher than normal rents that cover everything; b) one turns into a short term; c) the third I focus on getting the highest dollar with short fall of may $100 per month and planning to raise rents in the next few years to cover that eventually.Problems: I have been a long time airbnb user.

We don't bash your stripped down, bare bones, operational stance with blind rage.

If the city's requirements are bare-bones but all active rental listings are more elaborate, we go with the market trends to make sure we are competitive & provide what tenants are looking for.

The other issue with that area these were post ww2 homes and built as cheap as you can build a home so the bones are no good either on most of them..

Typically 6% for bare bones permit set and you will have to find the contractor plus project manage it through construction.