.#3 Contact Local Contractors for Labor PricingCall 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.#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.

Excluding land, office construction, pouring cement pads and asphalt for the drives.

A Squirt of asphalt cement.I had one one time that went through an interior wall, and out the window in a bedroom. 

.#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.

Often in Worcester they call the roof "historic" so you have to apply for a waiver to replace it with asphalt shingles if you want to do that. 

If you have asphalt shingles, pay a little extra and opt for dimensional 35 year shingles; the majority of the cost is labor - don't pay for it twice!

@Matthew McCormick its a bitumen (asphalt rolls) roof, has some tear down and aluminum coating already per inspection report seems like seller did that to extend life of roof maybe 5 years ago. 

Asphalt/concrete? 

The exterior was completely redone with new vinyl siding, new roof, landscaping, and a asphalt driveway was installed.

The exterior was completely redone with new vinyl siding, new roof, landscaping, and a asphalt driveway was installed.