There is a prevalent myth that one must incur debt to "improve" ones' "score". BALDERDASH!
The last time I owed anyone anything was 20 years ago on a house payment which actually accrued me interest, but that's a different story.
We currently hold 9 credit cards, all of which pay US for using them. I have held a multitude of cards for 43 years and have never paid a single penny for the privilege. Do the CC companies hate people like me? Probably. But that doesn't stop them from extending even more "credit". Across those 9 cards we have in excess of a half million in "available" funds.
Having exhaustively typed all of that I will note that in our 15th year of ROVING fulltiming I am at 841 and she is at 839.
It cannot be emphasized enough: DEBT FREE