I need to spend all my waking hours finishing our renovation on our house until next spring. This leaves me with a border about 3m x 10m. What should I do with it between now and then?
It depends whether you have some compost to spread or any organic matter will be good as soil feed.
Then it depends what weeds are growing, they need suitable mulching.
That is a good plan, the strulch will make a nice cover on top and reduce weed growth even more. I hear it does not discourage slugs, you will find out if that is true next spring, best of luck.