You've got some good ideas in your solution, but you may want to attack the weakest part of your search first -- the name search. DBIx::TextIndex
might be a bit difficult to implement, but it looks quite powerful.
My only other suggestion (aside from the other wise monks' posts) is that you should store your saved search results all in one table with a key id, rather than separate tables for each search. If keyed properly, it should be just about as fast in searching -- and much easier to maintain/purge.
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