You can learn to fix just about any household appliance. 

I have read about people estimating their expenses based upon the useful life of the cap ex items, roof, hvac, appliances etc...However, when analyzing properties this information isn't available.

There is also Business Equipment Tax due on all the appliances in each unit.

You have 5 roofs, 5 water heaters, 5 appliances, etc.

@German Hernandez - CapEx = capital expenditures - expenses for things like appliances, roofs, driveways, etc.. stuff that has to be replaced every so often.Most people (maybe all) here are not going to be on board with the high-down-payment, low-loan-balance approach.

The house could be a complete mess needing a new roof, new plumbing and electric, and all new appliances and floors.

People are like 50% is too high but you have to factor all of these in.Vacancy (6%), Utilities, Insurance, Landscaping/Snow Removal, Pest Control, Repairs and Maintenance (5%), Professional Fees (Accountant, Eviction Lawyer), Management Fee, Cap Ex (Reserves for Boiler, Roof, Appliances, Etc), Trash Removal, Water Bill, Real Estate Taxes. 

That way, if they know of a local place with very well priced materials or appliances that would save you money, they would be encouraged to share with you while also being rewarded.I decent place to start would be Ikea.

Actually, that may be something you want to look at again so you set aside enough monthly to cover maintenance and interior repairs--you only have the interior--AND replacement of your interior components for CAP EX like appliances and flooring, which will wear out.

Stolen pipes, stolen appliances, stolen water heaters.