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.

Is this asphalt shingle or metal? 

@Charles Situ and slate tile under asphalt makes 0 sense what so ever, FYI. 

Surface- Rock or hard surface (concrete/asphalt);If on rock/asphalt put your tongue leg or stabilizer pads on widerpads to spread the weight out.

For example, some lenders will require you already own and operate a similar asset in the same market wherein you are buying the subject property, and there will likely be a minimum number of spaces and pavement requirements for the park. 

Am I being unrealistic to find a better deal without hitting the pavement, cold calling, direct marketing or wholesaling a deal?

House is from 1978 and I'm looking for a contractor to quote me (to help me negotiate a credit with the seller) for:New vinyl siding (existing wood siding is rotten through)New windows and trimNew asphalt shingle roofing and fasciaThanks in advance!

This is assuming they are asphalt shingles.

Yard maintenance, HVAC / Roof / Appliances/ Plumbing/ Electrical/ pavement (concrete outdoors)/Flooring/ Tenant Turns/ and oh so many things that will cost money, and best to plan for them up front.

Hitting the pavement!