frasercrane wrote:

What is the special difficulty with replacing/installing an Arwa faucet?
No plumber in Manhattan will do it.

They are afraid of the unfamiliar.
And fearful of the extra care they would need to take
dealing with a $700 faucet and god-knows how much the
sink cost.

Find a reliable and conscientious "handyman" with at least
some skill level. Even offer to be his helper for the job.

Shouldn't take rocket science.

Jim