Can I humbly suggest you have a careful look at your weeds before you have the site rotavated.
If you have any bindweed, couch grass, docks, do not use a rotavator. This will chop up the roots and increase the weed problem rather than reduce it.
I took on a weed infested site in the spring, plenty of bidweed/couch. I have dug half the plot by hand so far and removed bags of the roots let along top growth. Very little has come back over the summer so careful hand digging in this situation has worked a treat.
Having said that, congrats and hope you find it as rewarding as I do.
Jerry