If you want to try out a new HF antenna that can be built with locally available materials, then check out this multi-band delta loop antenna from Rob of the "SevenFortyOne" video channel.
Rob takes you step-by-step through the design, construction, and testing phases of this versatile HF antenna. Depending on what you have around your home, apartment, or condo, the cost of this antenna could be close to zero dollars.
If you can't see the video, please insert this title URL into your browsers search box: https://www.youtube.com/watch?v=Gq4w0sETAuU
Here are some comments from Rob: