Exactly my thoughts. This has worked well for me in all facets of purchasing - lawn equipment, electronics, vehicles, etc.
When you buy a John Deere you’re buying a quality product. That it’s essentially bulletproof is part of the price of admission in the first place. Even if you can’t work on your machine yourself, in the unlikely event you need to get something repaired within the next two years, you’ll still be cheaper in the end.
It seems as though you are capable of repairs considering what you’re saying about maintaining it. That goes a long way more than anything. When I buy used a used tractor or vehicle, I’d rather have the well- maintained high-mileage/hour one instead of the neglected low-mileage/hour one.