I have a Vetus, courtesy of a PO. It is a 24volt with it's own set of 8D batteries mounted in the generator room very near the thruster, and 4/0 cable is needed as the amp draw is huge, I believe mine is 300. They have all the specs and battery requirements on line. So using your house bank and running large enough cable all the way up there is going to be a challenge. Vetus/Florida Bow Thruster (their US distributor) have a big facility here in Morehead City, not far from you.
We don't use ours a lot, but it is certainly nice to have in certain situations. Make sure your diver keeps it clean. Also, you will lose space in your forward bilge. Not sure what the implications are on a 58LRC, but on my 56MY, it means someone my size (6'2", 210#) cannot fit down there to replace or service the bilge pump system and forward sump. A more normal or skinnier person yes. I have been trying to find someone who can do it for about three weeks now. Not good!