So far the best deal for hotel I've found for the extra nights I need is for Estancia Real. Booking.com has the best rate, partly because they allow me to book for one person whereas the other sites seem to automatically assume for two. I've never used this site before so was curious as to experiences anyone has had.
I've emailed the hotel direct about their rates because I can't seem to find them on their website. I may call if I don't hear back soon.