There is accessible accommodation. There's only one albergue, and planning a day or two ahead is definitely helpful, but we didn't have accommodation problems on this camino. This is where we stayed (which I have posted elsewhere but will paste here for convenience):
Caldelas: There’s an albergue in Caldelas with 16 beds. It’s €5/bed and we are the only ones here so we’ll take a ‘double room’ for €10!
Campo do Gerês: We are at the HI youth hostel although it’s a bit far from the village and at €39 for a room without bathroom even after a pilgrim discount, it’s not as cheap as it should be. Albergaria Stop is better located, has a restaurant and charges €45 for a double, so in hindsight that would have been the better option.
Os Baños: PR As Termas in Os Baños has comfortable double rooms for €40 right across from the springs.
Castro Laboreiro: Hotel Castrum Villae, a 3-star hotel for a very reasonable €42/double with a hair dryer for our soaking shoes!
Cortegada: Casa do Conde is a nice ‘Hotel Rústico’ that has good-value rooms at €35 with a pilgrim discount and a choice of two different stamps.
Ribadavia: Pension Evencio (Garden Lodge) has simple double rooms for €29 and a decent attached restaurant. It’s a 15-minute walk north of the historic centre, though, so maybe
@Isca-camigo's suggestion of the Hotel Caracas (marked as a Restaurant on Google Maps) would have been a better choice.
Feás: A Forno do Curro is a Casa Rural just outside Feás that has a tiny room out the back with two beds for pilgrims for €25.
Soutelo de Montes: Pension San Roque has double rooms for €30 (singles for €18). The accommodation is down the street from the restaurant of the same name, which you’ll reach first and is where you need to check in.
Codeseda: The Casas Rurales Casa O Avó and Casa O Palomar are run by the same owner, Francisco. We have a very comfortable room/apartment for €40, which must include a large pilgrim discount. Highly recommended!
Rarís: Casa Taberna Mella in Rarís is run by a lovely Galego/Brazilian couple and we had a great meal and conversation here. The only issue is that it’s a bit pricey at €25/p for a room with shared bathroom.
Average: €17/p/n