The answer to this is going to depend on your mechanical dexterity. I'm not a gunsmith, but I collect pocket pistols. I've detail stripped several hundred small pistols, and managed to get them back together again, though some of them were considerably more troublesome than others. I recommend you have the assembly/disassembly instructions on hand before starting the task, sometimes there is a "trick" that will save you considerable time, and it's nice when someone else figures it out with hours of their time, instead of yours.
One technique I've used it to strip it down to where doubts start to creep in, then hose it down with Gun Scrubber, lube it well, and call it good. This has only been necessary with a couple of pistols, but it does happen.
Finally, one area that you shouldn't chintz in is tools! If you're going to be pounding pins out and the like, you need a good set of pin punches in both steel and brass. To avoid buggered up screws, you also need a proper set of gunsmith screwdrivers, I have the Brownells master set, and I picked up the extra thin blades in addition.
You're probably getting the idea that it's somewhat expensive to really be equipped to do this job, and you're right, especially if it's just one gun!