there are a couple of inherent problems with those terms. First, they are subjective. There is not a standard definition, and what sounds really good to you may not do it for me. Second, the terms are relative. Someone who owns $150,000 system may smugly think he has reached the nirvana of "hi-fi". but that system may be in the dreaded category of "mid fi" to the man who owns a half a million dollar system. I've noticed that for a lot of people think anything that costs a little less than what they have bought is mid fi and anything that costs a little more is a waste of money. So, these subjective labels tend to generate more heat than light and more often than not inhibit rather than encourage constructive discussion.
it's not about how much money you have spent on your system or how long it has taken you to put it together. I think it's about taking the money you have that you are willing to put into this hobby and building a system that brings you joy in listening to music. That's a subjective thing and will be different for everybody. There are a lot of knowledgeable people here, and on similar sites that can help you achieve that. But once these labels start getting thrown around, the constructive part of the discussion is generally over. So, as others have said, best to focus on what you can do with the budget you have to build a system that maximizes your enjoyment of the hobby because this is not a contest, it's about how you enjoy the music.