Tarantulas are kind of cool pets if you take care of them. They're like reptiles, I've had friends (one in particular) who've kept everything from a bearded dragon, up to and including boa constrictors, pythons and eventually graduated to a Nile monitor. I actually very much enjoyed spending time with the monitor, he was what every kid from my era thought a tank was. Just pure muscle, torque and traction and as long as he'd eaten a mouse or rat in the last couple of days very docile, you didn't want to be around him when he was hungry. He didn't care if you were 6' tall, you were food. I drew the line when he started keeping rattlesnakes. Normal rattlesnakes (I don't know what a normal rattlesnake is) were pedestrian so his were Mojave Greens, they were all kept in earthquake proof padlocked cages, but one had been "neutered" by a vet (the venom sacks in its head had been removed) and my friend would, despite my protestations, take it out of the cage and handle it. I'd had enough of this nonsense (if a snake can grow another tail what else can it grow?) so I only kept in touch over the phone after that. I kept telling him a dog or cat was a better option for a pet. He lived a very full life and died at 35 from cancer. Just get a dog or a cat and try to not abuse it and it will be your best friend, or don't if your religion tells you something nearly every other society on the planet has benefited from is beneath you. Try explaining that to your kids in the South Bay and not having them resent you.