Family hotel for 4

hi

we have started looking for possible hotels for next March. we will be there for three days. I'd rather a hotel over AirBnB but am having trouble finding suitable hotels for less than a fortune.

we are a family of four with a 15 year old girl and a 12 year old boy.

ideally we would have a hotel with 2 rooms. we need a double bed and two twins. we would also be ok with adjoining rooms with the same bed types.

we had no trouble finding this in Italy but Spain seems to be harder.

any tips? we would like something well located and clean with good reviews. we aren't looking for a 5*.

Ideally we would be looking at something for less than 500 euros/night - which may be a challenge.

any tips are appreciated!

thanks.