While there may not be a large profit margin, there is not much to do to the property.Here are the details:Del City, OK Area (Oklahoma City, OK)1 Bed; 1 Bath840 Sq Ft on 0.38 AcreCentral Heat/AirWhole house pre-plumbedCount Assessed Value = $58,000Zillow's Estimated Value = $66,700The roof has a new deck, and it needs to be shingled, but he already has the shingles on site.

.* Exterior currently has old shingles.

They're saying there are 4 layers of shingles on the roof. 

Repair roof decking and shingles.8.- Repair/replace plumbing.

They are currently shingled, but ive been told that it may be worth investing in metal roofing for various reasons. 

At some point the cedar shingles may need to be replaced instead of painting, paint and siding costs may not increase at the same rates, etc.

.#3 Contact Local Contractors for Labor Pricing / Hire a GC to ConsultCall local Subcontractors and get budget pricing for common repairs on your typical rehab project.For example, call a roofer and ask what their average cost per Square of Architectural Asphalt Shingle Roofing would be on a 1,500 sf house, with a 6/12 pitch.Note: Some contractors will be reluctant to share pricing without seeing the property, but tell them you are just looking for a rough budget number you can use on future projects.You can also pay a General Contractor a consulting fee of a couple of hundred dollars (per house) to walkthrough a few properties with you and provide a detailed estimate of prices that you can use as your 'menu for future projects.#4 Compile Your Prices into a Spreadsheet or Estimating SoftwareOnce you start to get a better understanding of Labor and Material costs you will want to store this data into a spreadsheet or software that you can use to help you streamline the estimating process.The Book on Estimating Rehab Costs comes with a spreadsheet that you can use to help you populate your own database of labor pricing and material pricing.

If the shingle are curling, broken, or missing I’d get a couple estimates.

If so, they are more expensive than a rubber or shingle roofRough Electric- Include fire alarm system on a triplexRough Plumbing- Including gasHVACSprinkler- needed for a triplexDrywallTrimPaintTileKitchensAppliancesPlumbing finishesElectrical finishesFinal Cleaning (negligible in the grand scheme)Landscaping/HardscapingThere are some other smaller pieces that I left out, but these are the majors. 

Roof pitch 12/12-New shingles and edge metal $9k (plus replacing plywood where needed)-exterior painting $6k (definitely will be replacing some cedar boards here, but not clear on how many, maybe 10-15) -rebuild four stair walk up on porch $1.5k-carpet tear out and LVT (4.5mm clic, 12mil wear layer) throughout $15k-replace 40ft of cedar fence $5kLet’s assume that there are few to no surprises and the work quoted is the only work necessary.Let me know if I’m missing any info that would help.