Ours is 3000 square feet, plus four basement rooms, plus garage. An acre of gardens/woods.
We do a lot of the DIY ourselves, and we do all the cleaning and gardening. We've done things like replace the garage roof, replace the kitchen and two bathrooms, decorate throughout, replace doors, etc.
We did have someone come in to replace all the downstairs windows but it wasn't all that expensive.
A few years ago we had 6 huge trees taken out for $1k but other than that we generally take out trees ourselves, and chop up any useful wood to burn. We take the rest to the local dump. DH bought a pickup truck a long time ago.
I am going to get someone in to redo the floor in 3 rooms downstairs and sand/refinish the remaining floors, as I am knackered from us doing it all ourselves.
We have someone plough our drive when it snows - we share it with the neighbour which helps keep down the cost, but it's probably still $500-1000 a year.
We had the drive resurfaced a few years ago and I think that was $15k (again we shared the cost).
We share a ride-on mower and ride-on snowblower with our neighbour, and we have another snowblower of our own, and a generator. Also DH has at least 3 chainsaws. And we need 4WD or snow tyres just to get up and down our drive in winter.
Certainly things add up, even if you do a lot yourself.