wacom tablets (I use one) are pretty cheap because you´re not buying an entire tablet, only the little pad thingy that you draw on. I`m not saying they're not expensive though. And between a phone and a drawing tablet, It really depends on what you want to do. Do you want to risk being different by not having a phone but you can further your artistic talent? Or do you want to give up the drawing tablet and keep drawing with a mouse? It is a choice you have to make. Honestly, the drawing tablet seems like a good idea to me but again, your choice