True, mine have been small batches but Scottland makes it sound as though there is nothing less than 5 gallon batches that can be done. The OP has an apartment with very limited space. Doing a small batch makes sense for him/her as it can all be done in that apartment, no problem. Well, there is one problem, you only get half as much beer at a time but that give opportunity to brew more frequently to get the experience and less waste if a batch goes awry. The process is still the same, heat water to stike temp and add grain, keep the temperature in the proper range until saccrification is achieved, cool quickly and add yeast.