How long do you save 5% for Vacancies, Capex, & Repairs

[David Murphy]

I have been using the 4-Square method for analyzing rental properties for a couple of months.  

My question is at what point in time to you feel that you no longer need to stash 15% per month in savings for repairs for a property?  

• Do you save until you have xx% of the property value saved up? 
• Do you just save the 15% in an account indefinitely?  
• Do you want $x.xx saved per door in an account and when you hit that number you stop saving and move that money to additional income for yourself or use it to finance other deals?  

I'm trying to look past the first 3 - 4 years without getting too far ahead of myself. My personal goal is to have around 75 - 80 doors renting in my local market within the next 6 - 7 years while starting from Zero today.

Thanks for your opinions and personal experience on this topic.

David