Elenor, Your concepts are completely incorrect.  

If I'm incorrect on any of this Andrea, feel free to correct me.

I think someone changed the keying by using an incorrect key and if the kids do it I figured it would happen with tenants too.

It looks to me like it would be a terrible deal even with the low cost of the home, unless i'm incorrect in some of my estimations.Thanks!

@Yolanda WilliamsI think you may be using the term "flipper" incorrectly when you mean to say home seller.A flipper is a person whose intent is it buy homes, fix them and sell.It appears in your case that you originally intended to acquire these properties as rentals and decided to sell them.Your terminology may confuse people and have them provide you conflicting answers.

State in the complaint that multiple treatments were required because the tenant incorrectly reported the problem as "rats in the wall".

. $15.00 per closetLight fixtures – glass cleaned and bulbs replaced $15.00 per fixture /$1.00 per bulbCeiling fan, blades- clean top & bottom, motor housing dust free $30.00 -$50.00Vacuum – per room (carpet is shampooed by management after move out at no charge) $15.00Carpet- burns, stains, soil as per estimate / replacementBaseboards – dust, wipe off, vacuum per room $15.00 per roomA/C vent cover – vacuum, dust $15.00Windows – Glass, tracks, clean and dust free $20.00 per windowTo remove window pane, slide pane to center of track- grasp each side, gently lift up and pull forward to remove, clean, replace in correct order.Window- Glass replacement $35.00 per windowScreens replacement- $25.00 per window -$40.00 per patio door $25.00- $40.00Mini-blinds replacement $20.00 per windowPatio door – Glass, clean both sides, track vacuumed, wiped clean $35.00Patio blind replacement $50.00 per windowOutdoor patio globe- clean $15.00Sweep off patio and railings $15.00Bathroom exhausts fan/vent cover, clean, dust free $15.00Bathtub, clean tub and tile surround $25.00 – $60.00Bath sink, vanity/countertop, clean $20.00Bath – medicine cabinet, clean inside, mirrors, light guard $20.00 minBathroom floor & wall tile – wash, clean tile $20.00 minTowel bar replacement $18.00 minToilet tissue spindle replacement $5.00Toilet – clean inside bowl and outside $20.00 minToilet seat replacement $20.00Kitchen cabinets – wipe off grease; remove shelf paper, empty out $20.00 minKitchen-sink, countertop, wipe off, clean garbage disposal ring $20.00 minDishwasher – clean, remove any food particles from inside $20.00 minVent hood – wipe off grease, clean filter, clean light guard, top/underside $20.00 minStove/ Oven- wipe off exterior, clean under drip pans, clean oven/racks $25.00 min to $125.00Drip pans – clean (replacement cost is $7.50 each) $30.00 maxBroiler pan replacement $20.00Refrigerator/ Freezer-wash off exterior, top, seals, inside, crispers $20.00 min to $75.00Walls / Woodwork – remove nails, screws $15.00 minWallpaper boarders-removal per room $50.00 minNicotine – stained walls/ woodwork that require cleaning (see below explanation) $25.00 per hour min.The cost to prep the unit for painting requires the walls and woodwork to be washed clean from the smoke odor/ and nicotine stained damage.GaragesGarages should be swept clean and all debris removed.Floors should be clean and free of oil and fluids. $25.00 minABANDONED PROPERTY REMOVAL DISPOSAL CHARGESKitchen table $20.00, Kitchen chairs $10.00 each, Upholstered chairs $20.00 each, Sofa/ Couch $35.00- $50.00, Hide abed $45.00, Mattress $20.00, Box Spring $20.00, Dressers $40.00,shelves, entertainment centers, bookcases, end tables, coffee tables, $15.00 - $50.00 each.Computers, Monitors $15.00 each, Televisions & Stereo Equipment $25.00 - $50.00 per item.

I do not want to give you incorrect information. 

The obligatory inspiring but incorrectly cited quote goes here.

Attempting to price a rehab by per square foot is a good way to be incorrect and get yourself into trouble.