Bakersfield CA. 2 hours north of LA
Tony Karts (OTK} are extremely good, for their softness and flexibility
Top Karts are also very good, and will endure more torture and crashes
Birel are also very good and quick, but I hate their banana brake system, one piston mechanically activated.
Most Italian chasis are really good.
That Tonykart may be a good choice for you, depending on how old it is, and make sure it’s never been in any wrecks and repaired. You can ask the seller about the history on the kart.
The other good thing about it is that you could sell the complete front spindles, brake system on ebay, or here, and make some of your money back. just a thought.