ved, the wife and i raced the circuit for the first time this year. a very good time. hooked for sure now. i suggest keeping it as simple as possible for the first year. start a budget(spread sheet). line item each race. mileage(round trip including motel to race site each day(be generous)), estimate fuel usage, lodging, food, annual RMSHA membership fee(you'll be assigned a # after paid), and race enty fees. that will give you an idea of the cost of each race. use the sled you have now. get the minimum gear needed, i.e., tek vest, shin/knee guard, tether switch on sled, extended snow flap(i bought a mud flap from NAPA and trimmed it, needs to touch ground when seated on sled & 1 inch wider than tunnel on each side), 4" RMSHA # on both side of sled(local graphics store can hook u up((maybe even sponsor the work and material to put their logo on your sled)), race jersey w/ RMSHA #, "RMSHA", SLP logo, and name if wanted(i recommend it), track screws(stub boy has some cheap one's that work until you can get ur hands on some Kold Kutters(find em at the race scene, might have to trim your paddle/lug down so when screws are applied they don't rip the heck out of the inside of your tunnel, tunnel protectors are also made), 5 gallon fuel can(make sure fuel does not have ethanol in it), nice little tool box(basic hand tools, rivit gun/rivits, duct tape, zip ties, super glue, etc. Be prepared to make some cosmetic repairs!! This is just the basics for sure. If you can afford more then go for it.
I hope that helps a little. The other folks on here will pick up whatever i missed. Make it fun and it will snowball from there with your wife. Make the first year a learning lesson rather than a great plan of winning the King of King title. Look at other racers sleds, ask questions and you'll generally find a helpful answer. I would say it is very family oriented, lots of wives race and lots just show up and support. Kids playing everywhere and really just a good old time. After the races families go swimming, nice dinners, and all sorts of other family stuff to do. That will be the seller for you is finding out your share of family stuff to do along with the racing! Good luck ved
king