I recently completed a portrait of a local lay minister to commemorate his 50th year in the ministry. The person who commissioned it was delighted and said that we had avoided the 'pomposity and aldermanship' that often dogs this sort of painting. The finished piece can be seen here.
Many portrait artists give examples of their charges on their websites. They vary dramatically but my own are shown on this page. If I can be of any help please drop me a line.
My charges are different for each individual piece, but do take a look at my website to get an idea of my work and a rough guide to costs. http://www.xiosys.com