Grow to approx 8-9 feet. I have heard people keeping these in vertical cages since they love to climb so much. Thats what i'm planning on. I"m going to build one thats 3'x3'x6' with a lot of ledges and i'll use wooden dowels to create a huge climbing structure and silk leaves from micheals or the like to create cover. it's going to look nice whenever I get around to it. I have seen beauty snakes in the classifieds from $45 to $300. I'm getting a blue beauty - look at the different types you may find one you like a lot better.
some info i'll go ahead and caution you about. i've had people tell me that you need a hook to remove from the tank because they're such agressive feeders that they will always be thinking you're feeding them when you open the tank. as with any snake you have to remember it will grow it will eat a lot (larger rats) and they are expensive so make sure you'll have the money for this at least in the near future.
i've handled a full grown vietnamese beauty snake, 9 feet long, before - nothing i have ever handled is like it. i have been handling wild snakes just picking up moving etc for the past 2 years or so (gray rats, coachwhips, racers, marsh brown snakes, hognoses) and i've been keeping blacks and texas rats for the past 4 months or so and they are so different from anything i've ever handled before. the guy said this was "an extremly calm one"...however it is one of the more active of the captive bred snakes i've ever handled (and i've handled a lot of captive bred snakes in the past couple years also). So for me handling isnt the problem its more husbandry for the beauty.
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The reason mainstream thought is thought of as a stream is because it's so shallow. -George Carlin
Battling ignorance one stupid person at a time.
Current snakes:
0.1 Licorice Stick Black Rat (Lola)
1.0 Neonate Black Rat (het for Lic Stk's) (Frankie)
1.1 Texas Bairds (Jose and Rosa)