So first off, just stick with Test E + Dbol. Don't mess with tren, considering this is what looks to be your first cycle.
Your Arimidex dosing will all depend on how your body reacts to hormones, but a good starting point would be 0.5mg E3D or so, you can just line it up with your test pins. You might need to use a little more with the dbol (again, just depends on how you react).
Just run the test at a consistent dosage the whole time. No point in going from 400mg to 450mg.
You don't need both Nolva and Clomid for PCT; just run Nolva (40/40/20/20). Side effects seem to be higher with Clomid, but that's just anecdotal.
Can't help you on cost.. a lot of factors play in to that.