Another option could be airbnb while you sort a permanent place. Often a bit cheaper if you stay for a month or so. We can recommend a nice place just out of Delft run by a very nice lady.
Thanks for the idea, checked it, but the ones in Rotterdam seem to be way out of our budget unfortunately. :( They are around 2.5k for a month, thankfully we're not that desperate - yet.
Another option could be airbnb while you sort a permanent place. Often a bit cheaper if you stay for a month or so. We can recommend a nice place just out of Delft run by a very nice lady.