Ok, I went into Hotel Colón and here´s the news. The rates are as follows:
Single room: €25,50 per night
Twin-bedded room (single occupancy): €43 per night
Double bed room: €46 per night
All rates include breakfast* and IVA (= VAT)
*Breakfast is served in the café on the ground floor.
The single rooms are on the small side but perfectly adequate for just sleeping overnight. The twin-bedded and double-bedded rooms are quite a bit bigger. The whole place is spotlessly clean and the two sisters who own the hotel are very friendly.
Check your PMs too.