So one difference with snakes is that they can & do become sick & need medical care, which is expensive. It's honestly irresponsible to keep animals for which you cannot provide medical care as needed, & while that may not be an issue with arachnids, snakes require different things, & it's a package deal. Sorry, but I've seen too many people that can't wait to buy the animal of their dreams yet fail to budget beyond the initial purchase of the animal. Food for large snakes isn't cheap either, nor are the large secure (!) enclosures they require, & adequate heat. Sure hope you have a plan for all that.