A flipper will go in and upgrade everything to match the top comps in the neighborhood, while a renter buyer will go in and make it clean and rent ready but not necessarily update it all the way to the same degree as a flipper (Caveats to this, but in general)An example may be tile flooring.

I have used local flooring shops to replace flooring, also have used big box stores...have also used local tile installer guy. 

@Khen S.I think my explanation was general when I said bathroom.The quote was for just the tub or shower and I supply the tile....nothing else.I am also looking for nothing high end....moderate and tasteful.

any advice for someone who owns a few rentals but always did conventional loans and never this type of major renovation, i have some basic construction knowledge, i consider myself fairly handy. hanging doors and doing tile is not foundations and water damage, plumbing electric  yikes,  i should get a few different estimates from contractors for sure,  , maybe someone can direct me as to a proper sequence.  

Are there any patterns and do you have battery backups for your sump pumps.  

The floor is tile.

You get to see the area and neighborhoods they are located in, accessibility to local amenities, traffic patterns and volume, opportunity to meet new people, sharpens your research and communication skills.

Look at migration patterns, towns where big companies are moving to, cities with colleges and hospital campuses, cities along major freeways that are close to other big cities and major destinations, etc etc. 

The house ended up with brown tile, brown cabinets, brown countertops, and a shade of brown paint that looked more yellow than it did brown.To my credit, that color palate was more popular at the time, but when I look back at it today it's a bit embarrassing.Going forward I have worked with designers almost ever time.

You could try talking with other local investors or property management companies to ask about what they are seeing and try and spot a pattern from all those data points.