Line-breeding when done responsibly doesn't have too many risks. One reason big name breeders charge so much for their animals is because you are paying for them to breed their animals responsibly.
It also isn't as bad for some species to line breed as it is for humans. We have way more opportunities for messy recessive things than snakes do. That being said, there are bad breeders who don't record their breedings and may be producing nasty inbred traits. This is why you have to buy responsibly and avoid shady sellers who aren't bothering to research proper breeding.

all that being said, OP, my lemon girl looks a bit like yours, and he looks like a very nice snake! Whatever he came from, he was either a lucky good looker or had well chosen parents!