In most luxury hotels, you get a better price for extended stays - usually this is 10-30% less than the standard rate. It is best to travel in the low season. Then it can also be 50% of the regular price. It depends on what you plan for a budget per night. For anything over 250 USD, you can also consult a Virtuoso agent. Agents will get you a better price than you can as they mainly know the people in the hotels personally.