Done some of that.
>electrical work
How often is this needed? Unless your house is so old and not up to code...? To give you an idea, I lived in a place for 2 decades and it never needed electrical work.
>trees that need trimming
It's your property - you control how many trees and how big. If it's too costly just get rid of them. Having said that, I just trimmed two trees on my property over a month ago. An hour or two of work and the right tool. Of course, if my trees were much bigger I'd have to pay someone.
BTW, I did not assume yard work as part of the amount per month. Of course, everything (including HOA, yard, etc) needs to be factored in, but I thought you were talking only about maintenance of the house.
>kitchen or bathroom remodels
How often? My house is almost 20 years old and I can see it going at least another 20 years before any such work is needed.
>painting
I assume you mean exterior? I guess - how much you need depends on the type of house. Mine uses vinyl sidings - no paint needed. But yes, you need to paint a few other parts. For my house, this is once every so many years - and the estimate I got was under $1000.
>replacing windows and doors
20 years old and look like new - I think mine will last another decade or two.
>furnace work including annual cleaning
I get my furnace tuned every year - costs $85. I included that in my estimate of less than $130/mo. Don't forget water heater maintenance too!
As I said, I'm not pulling numbers out of nowhere. I actually did this analysis some months ago. I have all the numbers on how much I've spent repairing stuff and maintenance in my software. I added it all up and calculated the number I gave you. It was actually $100/mo, but since then I think I've replaced two appliances so I bumped it up to $130 (total cost of the appliances + install is under $1000 - divide it up by 48 months I've lived there).
That's a pretty big disclaimer that you probably should have mentioned up front. Your choice of house is far from typical, and they make the costs some standard deviations from typical.
I've owned a non-new home for a few years now. I have all the records of repairs/maintenance. So far the average is less than $130/mo (that includes buying two microwaves and a washer)
My roof needs to be reshingled. That'll cost about $6K (got a bunch of estimates from roofers). Maybe $12K 20-30 years down the road for a full replacement. That'll likely be my biggest expense, which is not even $1K/yr, let alone a month.
My other appliances are old. Once I replace them, it will bump the average to at most $200/mo.
I don't do any repair work myself - always pay to get it done. You either have a huge house or live in a very expensive area (mine is above the national average).