Quote from @Will Barnard:
The capex as a percentage is not per door, it is per total gross revenue. So if your rent per unit is say $1000, then your total monthly gross rent is $5,000 and your capex per month for reserves should be 5% of $5,000. The next question should be, is 5% enough for this particular investment. The best way to answer that is to put into a spreadsheet all capex items, list their existing age, their total life span, their remaining life span and the cost to replace. Then add them all up and see how much you need to put away each year to replace each item based on the lifespan vs remaining lifespan. This will give you an exact dollar amount per year. You can then do the math to see what percentage of your gross income that comes out to.
Hey Will,
Thank you for clarifying this, I thought for sure this would be the best way to do it, in analyzing the property I think I just started to overthink it and then was worried I had been miss calculating all along.
Thanks again for taking the time to respond.