10,000 balls isn't very many, so if you only have one cue that would qualify then I have to wonder just how much pool you've played. I've hit at least 30,000 balls with every cue I've bought except one, and I've hit a few 100,000 balls with one of my older cues. Even a casual player that hangs out at a bar should hit at least 100 balls in one evening. Any "regular" pool player will easily hit over 10,000 balls per year, and a pro will hit over ten times that much. It's not unheard of for a pro to hit 1000 balls in a day while practicing.
I could be totally off base and misunderstood what you were trying to say. I can see your point when you say you need to hit at least 10,000 balls with a cue before you own it, but I believe you need to do this with a number of different cues before you can get a real feel for each cue's characteristics. After that, you can buy a cue and get a better idea of how it plays in a shorter length of time because you have something to compare it to.
23 others are passing through?

Maybe you're just too young and still a beginner, or maybe you keep searching for a new cue thinking that will make you better. If you've only gotten used to one cue, then anything that feels different won't feel right to you. The problem may just be allowing more time to get used to each cue. I suggest spending more money on table time and less on new cues, considering you have 23 that are hardly used.