Even though camels tend to be healthy, hearty creatures - anybody who eats thorns for breakfast probably isn't prone to heart burn - you should still consider whether your local vet will treat camels.
But what are you going to feed your new family member? In the desert, camels eat practically anything: low quality grasses, thorns, salty plants that other animals won't touch. If they are really hungry, they will eat meat, bones and fish. You can add a good quality hay or grain to your camel's grazing to keep him healthy - but watch out for the nutrition-packed hays that are available, you'll make you camel fat. Since the skinny ones are 660 pounds, I hate to imagine what a fat camel looks like. Camels are ruminants* like cows, so they spend about 8 hours grazing around and then another six to eight chewing the cud*. If you keep your camel near water, he may take sips periodically. But if his food is alive and green, he may not drink for moths because he gets all the moisture he needs form the plants. The most important thing you can provide your camel with is salt. They need eight times as much salt as cattle, so make sure he has plenty available.
Obviously, you shouldn't run out and buy a camel just for fun. They are sentient* and intelligent animals that deserve the same respect of any living creature. If you do decide to raise camels some day: educate yourself, be responsible in the care of your animal and keep up with the latest in camel current events.
It isn't really 'spit' - when camels get agitated, they might fling some of that cud around (hey, who wouldn't). Camels raised domestically (particularly those bottle-fed as babies) tend to be gentle and easy-going. Treat them with kindness and there will be no need for frequent showers. For spit, you'll have to get a Llama.
Exotic - Of foreign origin or character; not native*
Native - Related to the place or environment where a species of plant or animal came into being.
Ruminant - Having a multi-chambered stomach. Cows and goats are examples of ruminants.
Cud - a portion of food that returns from a ruminant's stomach in the mouth to be chewed for the second time. Ew.
Sentient - Conscious and having perception by the senses.