I don't know any R, and before I learn any, how difficult will it be to download a batch of addresses using this API?

When I was starting, i built myself an amortization calculator in excel but then I got lazy and just downloaded the 10bii app.I also found my note mentor here in BP, yours might be lurking around.

Download the Credit Karma app and do whatever it takes to get your credit score up! 

Download, print, wet ink sign and submit.

@Alexander Canha I used to use Cozy on my Iphone, and it was pretty seamless.

Or you can download my estimating templates I have in my Biggerpockets fileplace:Simple Estimate SpreadsheetDetailed Estimating SpreadsheetThere are other Estimating Softwares available as well which can help you manage the Estimating process as well...#5 Practice, Practice, PracticeWalkthrough potential rehab properties (or find properties virtually online) and practice creating detailed scopes of work, quantifying repairs and estimating rehab costs for the projects.#6 Get Your First Rehab ProjectYou can practice all you want, but ultimately you will learn the most about estimating rehab costs by actually rehabbing a house.

Or you can download my estimating templates I have in my Biggerpockets fileplace:Simple Estimate SpreadsheetDetailed Estimating SpreadsheetThere are other Estimating Softwares available as well which can help you manage the Estimating process as well...#5 Practice, Practice, PracticeWalkthrough potential rehab properties (or find properties virtually online) and practice creating detailed scopes of work, quantifying repairs and estimating rehab costs for the projects.#6 Get Your First Rehab ProjectYou can practice all you want, but ultimately you will learn the most about estimating rehab costs by actually rehabbing a house.

We have a deck you can download from our website.

Hey Tyrone,I have a Scope of Work template in my BP Fileplace that you can download at the link below:https://www.biggerpockets.com/files/user/drobertson/file/sample-contractors-scope-of-work-documentsThe SOW document provides detailed SOW notes for 20-ish repair categories from a project I did a few years back that should provide a good example of the level of detail that you need to provide for your contractors.

Describe the purpose for your loan, download your tax returns, recent LESs, 1099s, verify your phone number, and bank account then your good to go.