However, without locally accessible infrastructure within walking distance.
Which then becomes problematic again. From a transport policy perspective, it is not particularly good if you have to take the car for every trip, even if it is an electric car charged with electricity from your own roof. Currently, public transport may not be so en vogue due to corona, but that must not lead to throwing the entire energy and mobility transition overboard. One also has to think ahead: when you need more help in old age, people have to get to you somehow, and not everyone will have a car.
Well, I find 650 sqm a dream. Where do you still find such large plots?
I would approach it differently: Usually, you know how much space you need. If it is only about living, and you plan very cleverly, that may work out. But if you want to carry out your (self-employed) activity there at the same time, then the space requirement increases. My house is the absolute minimum for my space needs. With 0.2/0.4, a plot should not be smaller than 1,200 square meters. I would not have built a house just for living alone, it would never be worthwhile. However, I also have very special spatial requirements (operation of a recording studio). In areas with a development plan, you also have to be careful; in some cases the exercise of a freelance profession is even prohibited, which I consider unconstitutional, by the way.
Ideally, a village center is best, as it is always a mixed-use area, and in the middle was the smithy. I would rather use something like that as a model for today's new development areas. That takes up more space but loosens things up significantly. Municipalities should stop letting homebuilders finance their budgets.
Why is the thread being hijacked again with an unnecessary discussion for the OP?
It is the essential characteristic of an internet forum that questions are taken as an occasion for discussions. Those who just want a simple answer should please obtain paid expert advice.