I think you need to get some plastic on the ground.

The patios are also in need of attention, so looking at replacing the fencing and pouring concrete patios.  

Here is an estimate for my patio,  27x12 feet $2430 - contractor dose everything.

. $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 gave my tenants additional screens and this plastic tool ($6). 

However it's 1" in diameter so they are using it as a guide to run a new plastic gas line through it. 

But you must go to a retailer to order, they do not sell online.Note the wood not plastic corner brackets, and the sides dovetailed into the face frame.

They didn't have plastic or even steel.

Take a rear photo with no snow, and organize/stage the patio.

We've provided bags (3mil contractor type plastic bags), boxes, tape, and a marking pen before.