It’s going to take years. Quite frankly there are only 3 players on this team that would be in the rotation (Top 9) for a NCAA Tournament squad. If any of those three transfer then you have to start completely from nothing. It’s a minimum 2-3 year rebuild at this point.
Who are the 3 you have in mind? Going by your numbers, my 3 are Bolton, Solo, and JCL, but obviously this is quite subjective.