Oh wow, you know nothing about Gliders, do you?
It is not okay to keep Glider's outside. They are small animals and predators can easily harm them and they can become ill and insects will bother them and wound them. Sugar Glider's need to be kept warm in the winter, they even sell products to keep by the cage to keep your Gliders warm. Pet Gliders should not be put outside. If you plan to do this, do not get one.
Second, no you cannot own just one Glider. This is very selfish. Picture some strange, giant creature taking you away and hiding you away in it's cave somewhere and without any human contact for the rest of your life. This is how it is with Gliders. They are extremely, extremely, extremely social pets. They need a lot of attention. They live in colonie's of at least six gliders or more. They can become extremely depressed without another Glider or any attention. Depression leads to a fatal death.
Once they are bonded with you, yes it is okay to take them with you wherever you go. Many Glider owners put them in the bonding pouch or in pockets and carry their gliders with them throughout the day. They are nocturnal so they are asleep during the day while you do your business, but they will wake up at night time. Sugar Glider's bond very close to their owner. Once they're bonded, they will always come straight back to you. They love to run all over you and they love hiding in your pockets, climbing on your back, on your head, etc. but depending on the gliders personality, they can also be very calm and loving and enjoy sitting aruond on you and being pet or hanging out in the bonding pouch with you.
Yes Sugar Gliders do pee and poo on you. They have no bowl control which means that they are impossible to potty train. Usually when Gliders first wake up, like anybody, they will go to the bathroom. Wait for them to go to the bathroom, wait a little longer to make sure that they are finished, then let them out. It's unavoidable, they will go to the bathroom on you, but it can sort of be prevented. Sometimes they mark places and you with their urine.
Also Gliders need a special diet. You can't buy their food at a pet store. Their diets need to be vet approved. I'd recommend looking up the popular sugar glider diets and using those. BML and HPW are the most used diets for Gliders. It gives them everything that they need to stay healthy. Make sure that you are making the diet correctly though, or they will stink very badly if you're feeding them poorly, or they can get sick. There's also a chance your Glider can get HLP (Hing Leg Paralysis) if you don't feed it correctly. Basically, they drag the back of their legs around because they're unable to walk. HLP is caused by a lack of calcium in the diet. So bad diets are extremely fatal to gliders compared to most pets.
Also when you get pouches, make sure they're made of top quality fleece. If gliders get their tail or legs caught in the strings, chances of your Glider severely harming itself and losing a leg or a tail is great. They also tend to chew and swallow on the strings, which is also bad for them as well. You need to clean the pouches and let them air dry to keep them in the best shape. You also should replace them after a while to make sure they're not worn out. Gliders need to be checked on to make sure they're not harming themself.
