And artificial star collimation isn't much use on an SCT; the mirror will flop differently when pointed at the sky than when pointed parallel to the ground.
Put it somewhere above, on a roof of a building let's say.
Whatever you do won't be nearly as good as star collimation. If you live near a very tall building (having it on the roof of your house, 20 feet away, isn't going to help much), you can play with an artificial star during the day, but it's not as if seeing during the day, near the earth, is any good, either.
This can be useful for getting a really badly collimated scope into some decent collimation. But there's no substitute for pointing your scope high in the sky, at an object essentially at infinity, for proper collimation.
And collimating an SCT really is easy. Any SCT.