Second door on 30' International

[YYCStreamer]

First post on your board. The wealth of information here is astonishing!

The Bride and I are looking at a 2015 30' Serenity. (It's our first AS.)

The listing shows it's a custom job with a second ingress/egress door for the rear bedroom.

Firstly, is it a nice option? Secondly, how much do you reckon it should add to the list price? I understand it takes about 8 man hours to construct one of these nicely engineered doors, and I do appreciate that.

Thanks in advance for your guidance and wisdom!