INTJ takes relationships very seriously and for me the beginning stages are full of automatic dq. If someone approached me this way, I would probably push back e.g. there is no number, I'll be done when I'm done. I cannot stand being rushed.
You either need to create a dialogue that doesn't sound pushy, be patient, or realize this might be a sign that this guy isn't for you. Maybe you're not getting a quicker response because the cons you're presenting are equal weight to your pros.