It's a windfall.
I also have conversation students who want to learn
informal Japanese.I meet unexpected but meanigful time though their directness sometimes perplex me. They say Japanese conjuction and word order at real conversation are complicated. Surprisingly,they sometimes know vogue words only among high school girls and ask me their means.
I rather want to ask,"Where did you learn it? Are you going to use it?" creepy.. It's not easy to teach language.^^;
The new conversation time become more valuable than 3000yen,I hope. Anyway,3000yen/h wa kanari oisii yo!
You can kill two birds with one stone. You're lucky.