Do I need one sheet of paper?

You can purchase a light table for art, such as an Artograph LightPad 920. You'll have to be somewhere dark, like a dark room or anywhere with the lights off,...

Yes, you can do this by selecting the entire sheet then specifying you want it to be uppercase.

You can use rags instead. However, paper towels are not going to leave fibers behind that could later block your gun when it is in use, causing you to strip...

The idea is the same on any paper. The grid is only to help get the lines exact. If you struggle drawing it without a grid at first, you can...

Use Trevor, as he can use his own hangar if you've progressed far enough in the story to unlock it.

You can, it just won't be as flexible when you fold it. I'd recommend not adding stems, as that will put more weight on your flowers.

If you're layering them for one of your linens to be on the bottom and the other on top, then yes it can be but the inside of the ruffle...

Go on eBay and find one pulled out of an old one, because the power supply on all-in-one computers is proprietary.

You can use Photoshop or other software to cut the sprite out and trim the background, or remove it altogether.

I say you should use only one, especially if you don't have enough money for two. Just wash them thoroughly after every use so your makeup doesn't mix!