Busco Alojamiento para 1,2 o 3 personas en Alemania

We are 3 friends who are going to be in Germany for 1 year with a working holiday visa, we are looking for a room for medium or long term. We are easy going people and we want to experience Germany, save some money and keep traveling. We would like to be able to see the accommodation before renting it and if possible that it allows us to do the anmeldung. We are Argentineans and given the economic situation of our country and the banking limits imposed by the government, we prefer to pay in cash.