I've had my Mini-14 since 1983 and have fired countless thousands of rounds through that gun without ever having removed the bolt assembly for cleaning. The thing still runs flawlessly and has never, ever jammed on me. I use an old toothbrush, some cotton swabs & canned air to blow it out after shooting, but that's about it. I do keep it oiled lightly with Rem. Oil on the internal parts. I also clean the bore with a brush and patches after shooting it.
I don't think the deisgn of that thing was intended to be stripped down for cleaning. As you say, taking the bolt out and re-inserting it is a major ordeal. Just keep the bolt face / extractor area and the receiver face clean of powder residue and you should be good to go. The toothbrush, swabs and canned air is good for this.
Good shooting to you, enjoy that Mini.