So let's see...( someone correct me if I'm wrong here). First you drop thousands on those two snakes. Then you start breeding.
You'd have a 25% chance per egg of getting a spinner het for ghost and albino on the first breeding. We won't even take into consideration the probability of gender, let's just assume that works out in your favor. Then breeding the spinner het back to the albino ghost, you'd have a 6.25% of getting an albino ghost spinner.
If you can do that in 3 years or less, please send some lotto numbers my way, too!
The answer to your question, as far as I know, is that no one really knows. When you start working with multiple alleles and recessive traits the probabilities get so low that it takes a long long time to hit some of these combinations, like you said. There's a lot we do understand about genetics, but even more that we don't. I've never heard a good reason to believe that a snake can only 'hold' so many morph genes, but only time and breeding will tell!