If you are looking to get into Bandos, you should look at some of the smaller tracks in the area and check on their entry fees too. We are in FL, but at our track Bando drivers pay nothing to race because they don't get a payout. So a typical race day it costs me $30 for my pit pass and my son is free and we get three hours of practice on race day too. On Thursday nights there is a $10 a person entry fee for practice, so costs me $20 when we go do that.
Also, entry fees are a very small piece of the puzzle if you are trying to decide between Karts and Bandos. We came to Bandos from Quarter Midgets and our tire bill for a season of racing is about a tenth of what it was in Quarter Midgets. From the friends I have in Kart racing, our Quarter Midget tire bills were a fraction of what they spent on tires to be competitive in Karts too.
The engine category really depends on what Karting class you are comparing it too. The clone class is probably a little cheaper than a Bando over the course of a season, but the others are probably a little more expensive than a Bando.
Other parts are probably a wash between Karts and Bandos. This category really comes down to teaching your kid to protect the car.
Depending on your approach to safety equipment in Karting, it could cost you quite a bit more to outfit your driver to race a Bando than a Kart. Karting doesn't require fireproof anything as far as I know and head and neck restraint systems are optional too. That isn't the case in Bando racing, your driver needs to be fireproof from head to toe and they need an auto racing head and neck system.
Feel free to message me and I will share with you our expenses we incurred our first full season of Bando racing (2 drivers) compared to our last season with the same two drivers in Quarter Midgets.