False Dichotomy: The message presents only two options: either adopt someone or support the hypothetical alternative, which is framed quite negatively as 'murdering the children'. This is a false dichotomy because there are many other potential courses of action and viewpoints someone could have on the topic in question.
Ad Hominem: The phrase "would you just prefer murdering the children instead?" is an ad hominem attack, targeting the person instead of addressing the argument or issue at hand. Ad hominem attacks are often used as a distraction technique and they are logically fallacious because they don't actually engage with the argument itself.
Red Herring: The reference to being unable to afford a house is a red herring – it's a point that may seem related, but it's actually not relevant to the question of adoption. One's ability to afford a house has no inherent connection to one's ability or willingness to adopt a child.
Yep, I'm also a fan of short prompts. There's something satisfying about being able to achieve desired flavors/tastes with as few words as possible. The only times I seem to need to feed it more are if I'm running controlnets and don't want it to diverge too much from the original image.