RTB questions

[Daybreaker]

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?

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.

I still say get a snake from a breeder, but if you want to save money go for the pet store. I just personally would rather give breeders who work hard to produce nice babies money than a chain pet store.

Pastel is a morph of boa, basically they look very clean with minimal peppering with a lighter color.

My ~6' male had a "branch" (PVC homemade one) and he never used it and was happy just knocking it over. My cage is 18" high for him, I personally don't think they need any more head room than that (he's in a 4' long, 2' wide, 18" high homemade melamine cage). Once boas get larger they typically don't climb/perch as much.