Most people don’t keep a tracking sheet. Some do, I’m sure. I don’t. I keep my horses at home.
But it’s impossible for us to estimate your costs because things like property, property taxes, hay, vet care, etc. can vary wildly from place to place. And from horse to horse. Some horses are accident prone. Others need special shoeing. I have two that are on meds, etc. Mine don’t show. I don’t pay a trainer currently, but I used to.
It would be impossible for someone to tell you how much to budget for property, a barn, repairs, maintenance, etc. What you can get in central NY is hugely different from my area of NY and nothing in comparison to properties closer to NYC.
What is your ultimate goal here? To know how much you need to save up before buying a horse property? Or to know the monthly expenses assuming you have a horse property?
Again - you would probably do better to create your own, based on prices in your area. But you could do it on paper, also. Excel isn’t magical. It just does the math for you.