Prepping for firing my property management

I'm in the process of fixing our current property management and DIY, we are put of state so my plan is to create a spread sheet with all kinds of vendors to have easily at hand when something goes wrong, like a list of 10 electricians, 10 plumbers, 10 tretrimmer/landscaping companies etc. what do you think of this approach and what vendors is a good idea to put into my spreadsheets?

tia Sandra