Use the average life span of each component, divide the cost by # of years and use that annual cost added up as your "Reserves", and then add Maintenance costs on top of that...

Where I am, regulations and lot sizes change greatly within the span of a mile or two.

Based on this description, I would assume you have a pretty extensive real estate portfolio spanning multiple states with an important need for anonymity.

On residential propeties HVAC is ABSOLTUELY part of the structure and can't be taken on a shorter life span, it's 27.5.

This would result in a monthly payment of $500 for a 5 year span.

What would you guess is the average life span of an S&P 500 company?

When creating a CapEx table to calculate your yearly and monthly costs, should you include some sort of inflation rate for the items that have a longer life span?

Need to budget for roof 25 year life span, appliances and hot water heater 12 years, floors 10 years, hvac 20 years, kitchen and bath remodel 20 years, etc.

There isn't a locking/floating floor on the market that will give a variance of more that a 1/4" on a 10 foot span.

My capex budget includes but not limited to: roof 25 year life span, floors 10 year life span(except carpet only 5 years), appliances and hot water heater 12 year life span, hvac 20 year life span, bath and kitchen remodel 20 year life span, etc. let's assume you have 1000 sf of flooring and it is brand new the day you purchase it.