NLP for appartement ads
Look for entity recognition. The entities in your case would be price, number of bedrooms, size etcetera. What I would do is label a number of training examples with:


From character 12 to character 22 indicates the number of bedrooms
From character 39 to character 41 indicates the price


Etcetera.

After this you can train a model to classify entities. Sometimes the number of bedrooms will be in text instead of numbers so then you would need to write something that translates it to numerical values but you could likely just use some dictionary to do this for you.

Entity recognition models are plenty, but I think a character based LSTM approach could work well if your texts are not too long.