A lavender will run you about $50 at shows and remember lavender king and albino king are not the same, just like Albino BP are not the same as Lavender Albino BP.
Some people sell Albinos as Lavender which I have seen happen a few time.
Kings are great snakes, they move fast so it definitely makes the handling experience a little more challenging than what you experience with a BP.
Young individuals tend to musk but grow out of it fairly quick.
They are hardy snakes and very easy to care for, they will be much more forgiven than BP if you have husbandry issues.
As for feeding, they will eat anything they are far from being picky.