What is wrong with the best anchor available on the market today, the Rocna? One could be perfectly happy with a 10kg one for $400 for your size cat even with only a short chain. But go for the 15kg one and you be oversized by a mile.
Btw if one MUST save a miserly amount on anchor what is the next to come?
Rocna is just streets ahead of the rest.
How about to fill in your bio, so we know where you are? Hey?