My favorite scene♥ lol I really find this scene funny! This was the part when Yukiko was invited to an american show and there was a case that is still unsolved and they've asked Yukiko what can she say about the case, her impressions helped a lot in solving the case. Then Shinichi, doubting his mother thought of that she just heard his dad, Yusaku reading the newspaper about the case thus giving some hints.
Kudos' are rich! How rich? hmm. Just think of the things they have and had done. They went to hawaii and did some activities a normal family can't afford (Jet-boating, shooting, how to fly a helicopter etc), when Shinichi shrunk they paid 10million yen to Kogoro for Conan's expenses, Ran went to New York w/ Shinichi of course it's the Kudos who paid for the tickets, Yukiko has a Jaguar E-type car with a 265HP engine and Le Man series chasis, They have this super HUGE bookshelf filled with mystery novels, They can afford to have relatively big houses both in Los Angeles and Tokyo, They sent Shinichi to a fancy school like Teitan. Well I think that's the bottomline for the Kudos' fortune ♥