Really Long XLR

Looking to move my front end gear to the side wall in a new listening room.  If I don't want cables running across the floor in front in my speakers etc., then I'm going to need a set of XLR interconnects in the 40 - 45 foot range.  Wondering what other members have done and what cables have been selected for a very long run.  Obviously the companies asking $$$$ for a one meter set are not in the running.  All suggestions are welcome.  Not afraid to build my own if anyone has had great experience with bulk XLR cable.  Thanks.