weren't these Torres and Hauser guitars made out of cypress or maple because of their costs to build CG, and/or because of the flamenco traditions of that time?
It wasn't entirely because of cost. My understanding is that there were a number of factors involved with the wood choices. At the time that Torres and then Hauser I were building there was still more varity in the sound that players wanted than what came later and to a big degree today. Although players are reaching out to luthiers to make them instruments from alternative woods much more than a couple decades ago.
For Torres it appears to have been availability and cost to some degree as many of his rosewood instruments were made from recycled furniture parts. I'm in the middle of a book on the history of Spain and the writer maintains that it was not a good time to live there during the period that includes Torres working life. Spain had lost most of her American colonies, had no real infrastructure to develope industry, a political system plaged with corruption and incomes were extremely low if one indeed had a job. Torres did an amazing thing with what he had available to him.
During the early 20th century when Hauser was working the maple for guitar appears to have still been the dominant wood desired by the northern European musicians. One only has to look in the museums and on line collections to see the plethora of good quality instruments of maple coming out of Mittenwald, Markneukirchen and Vienna to name only a few centers. He would have been wise to cater to his customers desires and he was able to do wonders with the lowly maple.
The issue with the maple (and sometimes fruitwood [pear] as well) Flamenco guitars is one that I find interesting. During the early years of the 20th century these were more common. As these woods are heavier and denser than cypress they tend to give the guitar a mellower tone and more sustain. This fit well with the trend at the time of the guitar moving toward a solo position rather than just an accompaniment to dance or voice. It wasn't a style of guitar that lasted very long but today many very good flamenco luthiers are making instruments of maple and pear. Paulino Bernabe and J.A. Pantoja Martin are a couple I can think of off hand.