I personally agree with your concerns about the expense for the work mentioned and the time the
tooth will remain
in the mouth. Is there a permanent
tooth present that will erupt later
in the area? This affects decisions on extraction. Your child will most likely need an ortho consult by age 7.
The other thing is... The dentist stated it was "close" to the nerve and did not state it had "invaded" it. This was key to me.
If it were my child...