Fluid changes should be routine, but why work shorthanded and not use the right tools? That would be like trying to do service with one hand tied behind your back. The key here is if you want to be sucessful, do not take short cuts the first time around. Nothing worse than a new Do It Yourself project starting off with an unsucessful or disasterous (read expensive) disassembly. Most servicers also charge more if you did the work on it yourself. The key is to plan for sucess, by having the right tools, service manual and "reherse the steps" before actually doing them. You may realize that you forgot to get o-rings or gaskets, or Blue Locktite to seal/lock the fasteners in place and use "wet" thread torque value.
Do go to tool discounters for specialized tools like torque wrenches, micrometers, lifts etc. that are metal (stainless steel or hardened alloys are preferred) verses very expensive if name branded ones (use as visual examples to understand quality). And be patient...I go to garage sales when looking for tools, sometimes old school tools are better than new ones. Do look over this site regarding the SEARCH tab (type in key words to find related threads) and the SELF HELP tab for tips and details and how to do service better.