Some are in their 30th game now and still haven't gotten 500score. (yes, it is true)
It takes more than 30 games to get 500 score, especially if you've only played that many games and don't know what to farm, etc. Don't be elitist.
I'd rather slowly build a deck that works very well over a long time (perhaps with some PVP grinding with some deck to get the RoLs).
Ok, ok. Sheesh. I chose a random number off the top of my head since I haven't been experimenting too much with new accounts lately. Used to though, and I can tell you that this type of guide sent me the wrong message almost every time. I either restarted, got set back with a worse start than originally, or I sold cards to get this and ended up with a worse deck than before.
Trainer isn't a good tester of how fast you can do this type of thing either. I find trainer better later in the account, early on it doesn't seem that useful except for testing brand new deck ideas.