I decide what needs to be done and then figure the costs to do so per category.

Should I have a separate account for each of these categories or keep them all in one account?

I believe that there are a few really great zip codes that qualify with all of those categories.

Get Quicken, learn to use it (set up categories and subcategories) and start tracking your incoming and outgoing, for both personal expenses and rentals.

Trying to keep the logic simple if every house you own you can deduct 3 main categories on your taxes (property taxes, depreciation, mortgage interest) if I paid off a house I would make more with only two primary deductions.  

All the Realtors that live there are driving Uber now or something.we need a WE LOVE Columbus stand alone Category.  

Thanks to the Cost Segregation Study, the property investors were able to reclassify the property into the following categories to accelerate the depreciation:The use of the accelerated depreciation strategy helps real estate investors to reduce the tax liability immediately which therefore increases their bottom line due to the offsetting of income.

For many who might not necessarily be "looking" for more work they might not be investing in any kind of marketing and word of mouth is going to be the best way to find them.But 100% agree with @Corby Goade on this one, treat them like kings and queens because they are DEFINITELY worth their weight in gold. 

I just made a post in that category as well that I'd like to learn about buying lots that are R-2/R-3 and splitting them and selling off all but one to build on personally...

I beleive there's plenty of opportunties on the MLS, but they are usually categorized incorrectly i.e. a property possessing favorable zoning listed under the single family category, public records incorrectly listed the square footage, or instances where  BRIGHT MLS doesn't track zoning changes real time with recently introduced zoning bills.