Many of REV’s brand websites appear to have limited or outdated merchandise for sale, and some sites look like they haven’t been updated regularly.

Wait until the move-out date and confirm she's gone, then handle turnover like normal.

If I have been given proper notice of move out, then generally I prorate the days past the move out date based on the actual monthly rent that month. 

I would say that most of the information in that book is still relevant, but many of the numbers will be outdated.

The real estate market is constantly shifting, and most coaching programs are outdated.

Well, I went on property radar and after looking at their pre foreclosure category, I soon found out most of their information was outdated. 

For instance, the pre foreclosures being outdated here in KCMO...

If the former, note per Union City Rent Stabilization ordinance (https://ecode360.com/15397000 is a slightly outdated version), "the terms of this chapter apply to individual dwelling units within a building, including condominium or cooperative units in the process of being converted, or having been converted".

Winter doesn't bring too much extra cost as long as the home doesn't have outdated appliances and has sufficient insulation.

Quote from @V.G Jason: Brandon Turner's advice is old, outdated, and for the most part not relative to today's market.