RTB questions

[WarriorPrincess90]

I don't think we're that concerned about morphs. We'd rather save money on the boa, and put our money towards our balls because they're the ones we're going to be breeding/selling. The boa will just be our pet. Since we're really not concerned about the morphs and are happy with the looks of a normal pet store red tail, should we still pass? I know snakes from breeders are better quality, and I wouldn't buy my balls from a pet store (besides my first one, because he is just my little normal pet), but that's just because pet store ball morphs aren't too great looking.
I talked to a guy who knows that pet store and can get me a discount, and he said that I could get a normal, a colombian, or a pastel. What is the difference between the normal and the colombian? Or are they the same? Orrrr should I go for a pastel? Will it be the same size as a normal/colombian, just different color? What size should I be expecting from a pet store RTB once it's an adult?
A normal is just a "wild type" or normal Colombian Boa. It should be the same thing. But maybe these people don't know that, which would make me wary of the breeder that can't tell you the difference. O.o A pastel is a morph and would be the same size/weight as a normal. Again, it depends on the particular animal. Generally a pet store boa would fall in the same ranges we've already stated for a normal BCI. Since those are the most common in the pet trade.

and once he/she gets too big for the 20g I currently have, I will probably get a 6'x2' no matter if it's male or female, because I like to give them more room, but what about height? Should I get it 1' or 2' high? Do they like to climb or would it be a waste of money to get a 2'? I am personally all for a 2' high (it'll will be my display snake, so 2' gives me more room to make the cage look better) but I don't want to waste my money if they will never climb.
2' would be better since these snakes are semi-arboreal. Meaning: They love to climb. So definitely, the more height you can offer, the better. I wouldn't go much less than 2' in height though. Now, they're not like a GTP or something that will live perched its whole life. But they do enjoy climbing...as evidenced by their love of hanging out on their owner's heads.

Hope that helps.