Almost certainly Johnson will get the best result ever for a Libertarian presidential candidate, but unless he can get a major funding source, it's doubtful he crack 2%, much less 2.74%
I really see it as a question of media coverage moreso than money. (Though, yes, of course, the two are related, and if Johnson had a huge pot of $, he could gain more media coverage.) Nader broke through in media coverage in 2000, and the media actually talked about him as a (niche) third choice. Saturday Night Live had jokes about Nader's run during the fall of 2000, and it's not like they had to stop and explain the fact that he was a 3rd party candidate for president or anything. People knew that he was running.
Does Johnson break through in the media world enough that people will know who he is this time? It's more likely than last time, but I'm still skeptical. If Romney and Bill Kristol and Erick Erickson and other #NeverTrumpers actually endorsed him, then yes, he would start getting coverage. But I don't see that happening.