a clone isn't a budding plant dude. he's not gonna be growing it for you.
a clone (5 inches as you say) is simply a small beginning fo a weed plant. the equiv of maybe a week or so of growth. there will be no buds, no big fan leaves, just a droopy green thing. the way you're looking at it, is that well, a seed will suply you with 2 ounces of grade, so therefore it would seem acceptable for a seed to cost you for 1 ounce say $160, not quite how it is.
bud in the next three months? i can take a seed and it will be budding within the first month.
goto somewhere like the attitude seed bank, they will sell you feminized seeds at good prices, which will be a guaranteed starin etc.
oh, and just re-re-re-reading
when you grow that clone up, yes, it will have loads of bud, but in the same way, when you grow that seed up, you'll have the exact same of bud, only the seed cost you $10 instead of $65 for the clone (essentially you're apying soeone $55 for a week growth.
what you should do, buy one or two feminized pick n mix seeds of strains that tickle your pleasure, then when these are getting good in size, you can take a few clones off those plants and go the cloning route from there on, only the clones are free everytime after