My top business-related apps : Landlordy (rental income/expenses management on iPhone), Mail2Self (quickly email to yourself any web page you have visited and want to follow up later), MileIQ (automatic mileage tracking), Dropbox (obviously), WhatsApp (communication with tenants/vendors), Scanbot (digitizing paper into pdf files), 1Password (keeping my passwords safe and unique), Soulver (smart mix of calculator and Excel-like capabilities).

That's not to say that you won't get double-digit returns over the hold period but you just won't get them out the door. 

They won't take you from rags to riches overnight but they can produce consistent (high) double digit returns with 10 year, non-recourse, 30 year amortization debt.There are no guarantees and some markets are definitely frothy and there are financing and property strategies to help mitigate the risk.

Expect rates in the upper single digits with a few points and interest only payments during the loan term of 12-18 months).    

It may be as simple as replacing the main line out of the tank that goes to the drain field but you wont know until you dig it up, so I would plan for the worse case scenario.  

Leases I could auto populate in a minute and send for digital signatures.

It has its limitations, in that their Housing Price Index is based on the movement of single-family properties with mortgages purchased by Fannie & Freddie Mac, but it does go back to 1975 (where available), by Zip Codes (scroll down on the above link till you see "Five-Digit ZIP Codes" and download the Excel file.

You can always convert to a more digital process, but I find paper is easiest since 95% of the time you already have a receipt.

In the last two years, Bay Area prices increased double digit each year, but the rent price did not follow through.

One thing that we do re maintenance is to have all contractors take digital photos before, during and after the job.