Amazon Web Services had a 15 hour outage last year.

I too love South Florida but beware of optimism based on past figures. 

Also completely web-based, I find it to be a much easier platform for someone with little/no bookkeeping or accounting knowledge. 

Have you ever heard the saying "oh what a tangled web we weave, when first we practice to deceive"? 

@Gloria Sheridan,You are correct, ETC has lots of negative feedback not only here on BP but also on the web if you just google the name.

I have a rehab analysis spreadsheet uploaded in my file place which includes a Repair Estimator & Rehab Calculator to help you estimate repair costs and analyze the Max Purchase Price you should offer for a rehab.https://www.biggerpockets.com/files/user/drobertso...There are other good spreadsheets in the fileplace, or BP has their own web-based calculators.

You will never factor out all risk and the web will only prepare you so much. 

Unless you're closing so many deals that you'd run into scheduling conflicts, a good working knowledge of how your lender determines the timing of your first mortgage payment can help you optimize the benefit from the rental proration (assuming the property is currently cash flowing).

@Brian Ellis re: your routines, it won't be perfect but as long as there is progress every day you'll continue to like the feelings of progress and will optimize so they get better and better. 

Web sites that you use to gather information and understand trends etc.