A place to stay for my friends is needed

Two of my friends are going to come visit me from Oct 23 to the 27th. They are coming from Spain! I am looking for housing for them but at a discounted price. I am willing to pay $50 a night for them to use a spare room just for 3 nights :)
They are very friendly and speak fluently in English. During the time that they will be here, they will mostly be spending time with me. They just need a place to sleep and clean up. Please contact me if you have a spare bedroom and are willing to have them over for those nights. Thanks!

Mila

P.S: I live in Menlo Park and would like to have them stay anywhere somewhat close to me.