Normal depending on where you go and how long you stay. Neutron fields are very plenty but are a big target for those looking to hit Elite quickly so I expect within 3-4 years they'll be mostly used up.
Seriously doubt that. Taking into account that they start at appr. 10 kly towards SagA and continue with increased density above and below the plane right to the center, and then go on until about 20 kly after Sag A the number of NS must be uncountable and certainly un-scanable, even if every active player would do nothing else in those 3-4 years. Been there, scanned more than 1000 of them myself. The fields are endless.