The good smoke detectors are expensive.

Other then that, most of the time you’ll just need the Carbon/smoke detectors and fire extinguisher.

& utilities for 3-4 guys with jobs and no pets or smoking.

Anyone have experience using an ozone generator for removing fire smoke smell?

@Greg Parker Do you not require that of the tenants in the lease, similar to light bulbs, smoke detector batteries etc...?

Would I be able to paint the ceiling with dewaxed shellac to cover the smoke stain ,(and smell) without cleaning?

Cigarette smoking caused the fire. 

The tenants who live in the unit next to mine complained of an odor that smells like stale cigarette smoke in their apartment.

Also, depending on when the panel was installed it may need to be upgraded so that it accepts AFCI which is now required in all bedrooms and smoke alarms as well per NEC2017.But, I got wildly different quotes when I set it out to bid.

We are now one week into the rehab as I type this.Current BRRR Numbers:Pre-closing Costs: $2,740Plumbing inspection (because the house needed to be dewinterized, $150)Home inspection ($525)Appraisal ($655)Electrical inspection (because power was off on the day of the appraisal, $150)CO and Smoke Alarm ($366.57)CO and Smoke inspection ($52.50)Rehab consultant ($840)Kitchen Appliances: $2,000 (estimated)Plumbing: $7,300 (estimated)Oil tank ($1,800)Water heater ($1,000)Chimney liner ($2,000)Re-piping as needed ($2,500)General Contractor: $32,000Roof replacementDrywall patching and painting of entire house (trim, wall, ceilings)2nd floor bathroom spruce-upClosing exterior door in master bedroom and finish sidingBuilding two closets in two bedroomsBroken window repairsWindow frame repairsScrape and paint area over bulkheadFinish floorsRemove and dispose drywall from basement spacesRear deck repairFront steps repairInstall handrail to basementFoundation masonry repair and paintingRepair cement stepPatch area of exterior trim near kitchenPatch two rotted window sillsCap extra basement doorFill in dining room windowAsbestos: $1,500Electrical: $2,000 (estimated)Closing Costs: $3,733Home Purchase Price: $149,000Total All In: $200,472Expected ARV = $250,000 (initial appraisal for rehab loan came in at $235,000)Amount I have invested in the deal = $50,000Expected Cash Out at 80% = $50,000The situation is still very fluid, as we still have at least three more weeks of the rehab in front of us, but the numbers thus far are still looking promising, despite all of the surprises.