Unfortunately the cost of tickets varies significantly by the venue of the performance. DKM attempts to perform at the most cost effective way it can. I enjoyed concerts last summer at about thirty-five dollars. Part of the cost here was the ticket agents fee. Many venues require the concert to use a particular ticketing scheme, such as Ticketmaster, that rake a big fee off the top. When staging a concert, many communities require a police detail, and large permit fees for even being there. The mayor and city council in Boston are very welcoming of the performing arts. Hence the red tape is a lot less than in many other communities.
I hope this is not too political for the forum.

Yes that is a good day. As good as when my spouse suggested I add another kilt to the kollection.
Slainte