Warm rent (Warmmiete) includes heating and building costs; cold rent (Kaltmiete) does not. SCHUFA and proof of income are standard. Unfurnished is the default — “möbliert” is a different, often time-limited product.
Short-lets sit under separate rules. sivrce’s Georgia daily-rent product is not the Berlin model. When rentals go live here they will be long-let first.