First of all, Aikido is not practical, and it has no actual combat ability after practice, which violates your open principle.
Second, for karate, Muay Thai and Brazilian Jiu Jitsu, if you want to find a truly talented teacher, it doesn't matter, it's basically impossible without money.
Third, the three treasures, Philippine sticks, are practiced in the small circle of some senior fighting enthusiasts in Beijing. If you ask these two things in the street, it's good that one person in 100 has heard of them.
Fourth, forget about fighting Jeet Kune Do and armed police. Amateurs don't practice, but experts look at jokes.