I too have a TMI 30. Which I like very much. For a 1981 sailboat she is in great shape.
I have previously owned: Spirit 23, Catalina 27, Catalina 30, another Catalina 27, plus a couple of smaller sailboats. I don't claim to know all that much about boats, but I have played with them for the past 25 years. The TMI 30 is very similar to the Catalina 30. Like any boat built 28 years ago I am upgrading the running rigging, but other than that she is sound.