The tools needed will be different during the initial collapse, with wandering bands of half-starved marauders, as compared to the time when this turned to single or threes, stealthily searching for supplies and tools. Hi capacity magazines will be the need initially, to deal with a dozen or more marauders at a time. Revolvers and lever guns will do the job when the numbers thin out. In the end, tools that can get it done out to 300 yards or more will be treasures for long-term survival.
True, there are phases to anticipate. My first-purchased weapons would be more utilitarian with a focus on crowd control.
Money left over (heh) might go more toward craftmanship & aesthetics. Sadly, there’s been no budget for a lever or pump rifle for me. All function, no beauty. But then, that might be an apt description for myself as well.