That's a massive wall of text. I read most of it, but a lot of it was kind of incoherent.
I wouldn't bother with the UV Sterilizer, there's no real good place to put one in this tank anyways, they're mainly used to fight off parasites and kill certain bacterial blooms, and keeping the water clarity high.
For water clarity you can just run carbon (which is in Chemipure so you're good)
For Parasites, now that you have a quarantine tank, you're less likely to introduce them to the tank anyways.
As for removal of copper, I hate to say it, but if I was you, I would ditch the sand and rock. I don't trust that copper hasn't been absorbed into it and will leech out slowly over time. If you don't completely remove it, you'll never be able to have inverts again, so for me, I'd rather be overly cautious than buy some new CUC and watch it all die.
The skimmer thing has some merit to it... But mine runs 24/7... The only time it's off is when I feed frozen food, do a water change, or when I am taking it down for maintenance/cleaning. I would bet that most reefers are the same, skimmer just runs 24/7. That's not to say that there isn't any merit to running it only 8 hours a day, but for me, the benefits of keeping it running (great gas exchange and nutrient export) outweighs the savings you get by only running it 8 hours (saving electricity, maybe letting it be more efficient since it's letting organics build up first making them easier to strip).
If I think of anything else I'll reply again. Best of luck to you