Clone and start over?

OK 1st i admit to being a noobie grower - everyone was at one time right? Anyway, the plants I have now are sorta just not right for the AG - they been pruned all wrong, pH been all to hell, nutes have been God knows what b4 I got this - some went to hell just because - but some look great but in my opinion are just too damn tall for this setup. The previous owner made most of them so stalky that they would need to be 5 feet tall ....

SO - looking for advice (yes besides ditch the AG - you dont have to like it per se, so if you dont then dont post on this one OK?)

If this sounds stupid consider the source --- Is there any way if I snub out the rough looking ones can i still get a yield at all? I have 2 potential plants as of now, assuming the ones that are a foot tall with basically no leaves below the top will amount to nothing. Dont suppose there is any way to crop those lanky ones to make them bushy intead?

This was bagseed from some killer indica. Should I make some clones and start over with those? Should I buy some of that lowrider seeds i have read that will do OK in this setup and just start from scratch?

I dont mind buying a cord or timer or additional lights, and if i get an ounce - well, thats an ounce I didn't have right?

Can someone enlighten me on the use of reflective material? I have read on other sites that aluminum foil is a no-no.

If I intend on growing just a couple plants do i REALLY need to CO2 for them? Dont get me wrong, I am not a broke ass, and sure i could BUY some weed here and there - but hey if i can grow the strain i want, for no more than I smoke, then an oz of killer would last me for a couple months.

Yes - i know i know pics would tell you gurus a LOT more than i can describe and i am trying to get cellphone pics transferred to the puter (cord here, lost disk there, etc) - so - anything you guys can tell me will be a great help. I will be glad to describe what I have now if you need more specifics let me know.
Thanks....

Why dont you just cut the plant and just plant it ouside with a dome.

well it would be inpossible to plant it outside at my house - although i discussed exactly that same thing with my buddy who has ample woods to put it. OK if so, isnt it to early to transplant it? Are there other preps that need to be done to swap from water to soil? Deers are abundant in those woods (in SC) - should we chicken wire it? There is a great creek in there as well, should we plant it so that the roots have a constant water supply? What about the next go round in the AG? Clones? Diff strain?
Thanks for the input...
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Aight most of these are looking worse - droopy leaves, tiny bit of yellowing on some leave edges. Can someone PLEASE advise before they all just die? sigh....

OK how about just tell me what causes the purpling from the top? Thats the way my 1st one went down and now the others are doing the same? Nutes? Flush water ?? please help ...???