Although written in Spanish (which I don't read) the photos showing how to set up a small, wooden frame loom are quite informative. The loom seems to be one that could be easily constructed, if you're handy with saw and drill. The advantage is the tensioning of warp possible with the moveable top bar.
And, by the way, if you haven't yet discovered Weavolution you might want to check it out. It's a social network for handweavers and free to sign up to be able to post comments. However, there's quite a bit of information you can see and read without signing up. I've been a member for several months now and one of the things I like about it is that there are people of many different interests in weaving who read and post to it and quite diverse experience levels, also. I learned about the website above from a Weavolution posting, for instance. I've also just bought a loom from someone who noted it as for sale and in the fall, I posted a couple of tapestry looms for sale for friends. There are several special interest forums--for instance, there's one for Georgia Weavers; others forums for those interested in tapestry, for Navajo looms, for backstrap weaving... almost anything one could imagine being interested in you'll either find a forum where a few other people are also posting--or you can create a forum to seek out like-minded folks!
I hope everyone is staying warm and warped!