Get some estimates to compare and contrast.How much should I expect to pay.
Trade work is highly local for prices and it depends on the local going rate.
I can give you an opinion, but I am not willing to show up and do the work, so my opinion is not worth too much.
Pay can only be determined by the people willing to show up and do the work.
Needs a local onsite inspection.I see some chipping. Is it better to fix one off or replaster whole at once. Or postpone to some other time.
No way for us to tell from pictures.
When was the last plaster done?
What issues are there?