A good way to get a portfolio is to contact people and offer your services. Last year I sent emails to a few hotels and hostels in my area saying that I was building my portfoilio and if they would be interested in a photo shoot in their hotels. The agreement was that if they liked the photos and wanted to keep them them, we would came to a fair price.
One of the Hotels that I shot was Hotel D. Inês, in Coimbra, Portugal. Here are some of the photos that I took.