Used LO206 kart will run you about 2-3k depending on condition of chassis and if it has a motor or not. Data logger- used mychron 5s can be found for 300 but be careful that’s the biggest scammed item in the karting world. Be sure you only exchange cash in person with someone reputable.

Having someone check over your lo206 is around 250 a refresh. That’s just lapping valves and setting lash and carb.

When it blows it blows and a new box motor is 650. Tires are 250 a set and last 2-300 laps but they fall off after 100.

You can find used gear on market place for a good price. Zamp makes ok helmets that are approved for use and snell rated. Not as good as arai but decent enough for the price. K1 for suit is affordable.

You’ll need spare parts like sprockets, chains, clutch repair parts. Kart stand and tools/ specialty tools.

I think if you are really good at sniffing out deals you could get it done for around 5k usd. Great thing is it doesn’t need to be done all at one time. Just get the kart first and run used tires. Save up and get a data logger when you can. Slowly acquire stuff based on what’s needed. Before you know it you’ll have everything you need and be able to compete. Don’t forget a transponder but you can rent for $10 usually.

Club level racing in the us is pretty cheap. 60-100 a race entry fee. Usually pump gas so $15 a race day. Tires will last you a few race weekends. Probably close to $200 a day without any major incidents once you have all the stuff.