Roofing Estimate App

I am looking to build an app that will build an estimate for a customer based off of the following steps: 1.) Customer enters address on website / in app - clicks "continue" and this brings them to that address in Google Maps satelite view, zoomed in on that address 2.) Customer than has the ability to trace their roof in as many squares - not rectangles - as necessary to cover the entire roof. squares can overlap, rotate, and can be sized on all edges by customer until they get that roof traced. There must be an undo option or option to delete last square so that they have the ability to fix any mistakes. Once satisfied, customer clicks "continue" -->>> that step needs to calculate the square footage of the roof. .....What you need to know is that roofing costs are calculated based on "squares" --- Roof Squares Roof surfaces are measured in “squares” – a “square” is equal to 100 square feet of the roof. To determine the number of squares on the gable roof above, divide its total of 24,000 square feet by 100 (24,000 ÷ 100 = 240). This means you would need 240 squares of shingles to cover that roof...... 3.) Customer selects from " radio" type options on the next screen. a] Number of stories (1,2,3,4) b.] How steep roof is ( 3 radio options) c] Customer selects roof "style" (several radio buttons to choose from - up to six) - Customer hits "continue" and goes to next screen... 4) Customer select type of roofing material (level 1, 2, or 3 {to be specified later} 1.] Based off answer above, they select color of roofing material that they want that is available in that level. (another "radio" type of selection) - hits "continue" goes to next screen... 5.) This is a form for customer to enter their name, email address and phone number, with permission options to add them to an email list as well as to send sms messages (2 check boxes - customer can choose one or both or neither) Customer hits "get estimate now" - and based on values that we have attached to the above "radio" selection values, it will calculate an estimate for them and display it on their screen as well as email it to them. ***I need this to have a place to put Vendor branding info, logo, contact info, license #, etc... **** Colors to be designed in are Red, black & white ***I need to be able to embed this code into an existing website / create a new page or post for it, etc...