I strung my racquet 3 times with the same string and it still plays well. I don't like the added weight at the top of the hoop so I won't be reusing the mains anymore and will just tie them off. For the crosses I will start off with a knot and end with a few wraps on the bridge, zip tie, run the extra string down the throat and wrap the extra string around the top of the handle, and keep reusing my poly crosses.
I might also go back to using full poly, one piece and retighten the strings every 4 hours. I think poly tension stabilizes after the first stringing so I probably can go longer the second and third time.