My only comment is in regard to budget. People should choose carefully and closely examine the lineage for health problems; price should never be the deciding factor. A dog that's cheap today may well cost significantly more in vet bills over time than one that costs several times as much at first.
IMO, it really all depends on your goals and expectations. A lot of times people act as though a purebred is a health disaster and a mutt is a beacon of health, but that's just not factual; one can find great examples and poor examples of either. I think most would assume you'd not want a rescue dog due to the neutering, but anyone who's read many of your posts should know that's not a major criteria for you.
I think if you lay out your reasons for wanting a dog and goals you hope to acheive you should be able to find some that are compatible with you, just make sure you can provide all of the care required. A dog can't be put on hold because you're not feeling well or the weather is poor, that care needs to be placed on at least equal footing as our own, sometimes the need to force yourself to do it will be an advantage for you both, but it isn't optional.
Of primary focus to me is the dedication to care for a canine throughout the dog's life, that's #1 and if there's any chance a person might lose interest or be unable to provide care, they should seriously reconsider. Sometimes life changes happen that are out of our control and the best interests of the canine companion need to be kept in mind. It takes more effort for some, but determination can overcome a great many obstacles; I've known people who had major mobility limitations requiring a wheelchair to get around who manage to care for a dog who helps them gain a greater level of autonomy than they would have otherwise, but that comes at the cost of dedication and focused effort.
Sometimes what a person lacks is motivation and a goal. I know caring for my dogs has been one of my primary motivations and caring for them has been a guiding principle in all of my decisions; it's a double-edged sword. A person absolutely needs to understand and accept that a dog has needs and no matter how shitty you feel, how depressed, how much pain, or other reason that the dog needs care, today, tomorrow, every day and if that care can't be reliable, they shouldn't get one or should find alternate care for one they might have because anything less is unacceptable.