Hi, A very good value for money house white - not sweet - would be :
Arribeño 2019
It is made from the VERDEJO variety and has a denomination of origin from RUEDA.
Available in Mercadona for €2,20 - goes well with pretty much everything a very good all-rounder.
You could also try CONDADO DE TEON VERDEJO for €3,95 if you are looking for something a little better. Also in Mercadona.
But I find the first wine more than sufficient for a daily house wine.
Good luck!