I have always processed my roll film out side of a darkroom. Day light tanks are great. I avoid patterson because of the three I have owned all leaked chemistry. Yankee is not as leaky. If you process you not only save money but have control. As for budget I would say setting up a darkroom-if you have room- would be the best way to go. paper is not super expensive unless you do not exercise control in the darkroom. This is where controling your negative will be vry beneficial. A good well exposed and properly developed negative will print on much less paper than one that is too thin or too dense.
Good luck. If you have room for a darkroom, I am envious.