Most flippers she knows are using the ready to assemble cabinets because they are inexpensive and some cabinet manufacturing companies offer nice, modern and trendy finishes.

It needs a new roof and one of the units had some water damage so I’d need to redo the cabinets and floor.

Verify (with more pics) no toothbrush in the bathroom, no, or minimal food in fridge or cabinets, empty (of clothes) closets.

However, I like to both "tenant proof" my rental properties and make them highly desirable, thus I still go with granite counters and resurface cabinets, stainless steel appliances, etc...

And that would allow for more cabinets up top and a counter below? 

Dust ceiling fan blades Dust door, window and floor trimCheck/dust/vacuum window blindsWash walls with dish soap and warm waterWipe light switch plate and door handles Wash windows, check screens & latchesTest all outlets for polarityTest heaterBegin PAINT PREP sequence if necessarySweep floorsKitchenRemove dust bunnies from ceiling/corners with duster Replace any burned out light bulbs Dust ceiling fan bladesRemove all items from cabinets/refrigerator/freezerWipe inside of cabinetsClean/dust top of refrigerator Wipe down interior/exterior of refrigerator/freezer Vacuum refrigerator coilsWipe down cabinet frontsClean stovetopClean ovenClean microwaveTurn the sink faucet to hottest setting for one minute.

Where the cabinets remaining stock/clearance?

Full gut with new Electrical, Plumbing, HVAC, Windows, Floors, Drywall, Appliances/Cabinets and trim your looking ball park of $100K.  

I am thinking of adding a kitchen bar/cabinets, sink, microwave, and fridge to this small bedroom and using it as a mini-kitchen.

I mean change orders, like more kitchen cabinets than were drawn on the plans.