Capex Logic for 1st purchase

[Gerard Aliberti]

Hello all, I want to make sure I'm getting my CapEx logic correct for my first purchase. Most examples I see show the life expectancy for a particular item as its full life span. For example, a monthly cost for a roof would be, 20k @ 20 yr life span = $83.33 mth. That's based on a brand new home. However, if I'm buying a 15 yr old home and I know I need to spend that 20k in the next 5 yrs on a new roof, would I set aside that 20k (taken from down payment) right from the beginning but still figure the $83.33 mth and slowly pay myself back over time?

Also, suppose I only plan on holding on to the the home for 10 yrs, I wont be paying myself back in full and soley relying on inflation which isn't guaranteed.

Thanks for your feedback.