You can always do scrying evocation. Then all you need is a place to sit undisturbed for a while. The other ideas above are all pretty good ones as well. For that matter, evocation doesn’t have to take much space, and there are instructions in another thread for making a smoke machine so you don’t need incense.
If you have a little bit of money, you might consider renting a small office space or art studio space. They tend to be quite cheap, especially if you shop around and/or find a place that is not premium commercial space. If you have ritual more than a time or two a month, it would be much cheaper than a hotel room. Storage space, as necromaster mentioned, is cheaper still - but you want to make sure you know what kind of access you’ll have to the site and how likely you are to be disturbed.