The percentage needed to be saved will be dependent upon the property, the condition it’s in, and the overall general vacancy rate of the surrounding area.

Unless there is an infestation caused by the condition of the home, this is a tenant responsibility just like swatting a fly.

The contract says - RESIDENT agrees to keep the premises and all items in good order and good condition and to immediately pay for costs to repair and/or replace any portion of the above damaged by RESIDENT.3.

After weighting all of that, does it make the most sense to try to keep this tenant in place? 

Risk is minimized due to the amount of rents, property condition, property price, and location.

I paid cash-for-keys to get her out; she was supposed to leave the property in "broom clean" condition at the walk-through.

Keep it straightforward at first, but know that experience is the best teacher—mistakes are part of the process and will help you learn.For ARV (After Repair Value), start by running comps (comparable sales) on recently sold properties in the area that are similar in size, style, and condition to your planned rehab.

It can be tough to make money with high leverage, especially if market conditions change.

Long story short, I am in a bad financial condition as of recently.

I find with ANY project on a property, PLANS are worth their weight in gold bc they will show the exact inches, ft, etc that the project entails.