Impossible to say for sure without seeing a picture but most likely there was a loose connection at the screw terminal where the supply wires attach to the breaker. 

One of the main reasons for me to 1031 exchange to a bigger building is that it is almost impossible to take all the equity out when my father's income has not been good enough the last few years.

It might be somewhat impossible for you to calculate this on your own but your preferred lender should be able to calculate this for you free of charge for your next prequalification.

Insurance companies, banks, cellphone companies, and yes landlords will always have late pays no matter the amount of screening your doing,  it is statistically impossible to have zero late pays.

Many big box hardware stores will change the brands they carry literally every single year making it impossible to find what you had installed the year before.

The vast majority have a very high scenes of entitlement having lived their life off of free handouts and for that reason have zero respect for others.As a landlord the level of resentment your tenants will have for you will counter any training you attempt to achieve.C class tenants are like cats, virtually impossible to train, and must be constantly monitored as you would a child.

If deals were impossible we wouldnt be seeing so many flipped homes active and sold on the MLS every month.

Couple of ways to improve the accuracy of your numbers:Consider adding vacancy as a % (typically 5-10%) because it's impossible to keep all unit 100% rentedNeed to add CapEx for your future big costs (roof, HVAC, etc)Considering adding a reserve for any other unexpected expenses.Keep up the good work!

With no HOA, It will be next to impossible to get all the owners together to replace the parking area, especially since most of these units are rentals. 

If anyone is familiar with the market, they know that it is almost impossible to find any type of deal on the MLS, which an agent has provided for us.