You may spend the night in the parking lot with a camper, caravan or tent for free.
Compleet overzicht van slaapmogelijkheden:
https://www.booking.com/searchresults.nl.html?aid=318615
Recommendations:
Hotel in’t Holt 1654 in Zuidhorn
Multiple hotel rooms and a Grand Café
http://www.intholt1654.nl/
Many NYFZ visitors and musicians spend the night at the Best Western Hotel Aduard, just 5 km away from the venue.
A room is affordable here and the hotel is located on the road connecting Zuidhorn and Groningen.
https://www.bestwestern.nl/hotels/best-western-hotel-restaurant-aduard-aduard-92722