Any advice I am reading in the post is good advice and worthy of consideration.
Trecile is right, municipal albergues do not allow two days rest if it is not due to illness, but private ones do.
Among the private ones, there are some - I think not a few - that have one or more private rooms. To give an idea, in our albergue a person costs € 20 and two people € 28, it is a very similar price in all private, and half or less than a hostel or a hotel.
About the interior rules, in our hostel nobody has to leave the hostel in the morning because of the cleaning, we clean the rooms so that the person who is sick or resting (or simply leaving too late to wait for a train or a bus ) goes to the living room, to the kitchen or to the terrace. If somebody are in bed (people with gastroenteritis), we clean trying not to disturb, it is always possible to do the best for everyone. And I am sure that in any private hostel that has very good reviews on Google, they are also very attentive to all the needs of the pilgrims, whatever they are. Pilgrims frequently come to our albergue because they cannot be in the other albergues, even by taxi from a previous town, and it is exactly the same that they were in a municipal or were in a private - even nearby - with mediocre reviews. Therefore, a hostel with more than four stars in Google is a hostel that will give the pilgrim anything he needs, along the entire
Camino de Santiago.
But attention, the official stars of the signs of the hostels do not mean anything with respect to the quality of the hostels, the only difference is that with two stars it has dining room service and with one no, otherwise it may happen that is better the one with one star
There are also hotels that are so special that they are very worthwhile and surpass everything that a good private albergue or hostal can give, such as the National Paradores, and paying five times more can be a very cheap price, for one unique pleasure.
We also recommend the Hotel San Zoilo, a beautiful cloister-museum in Carrión de los Condes, the next stop after Frómista, our city. If I were a pilgrim, without needing to save money or wanting to give myself a pleasure, I would sleep earlier in that hotel than in our albergue, sincerely (and logically, although our albergue is really nice valued).