When we hang at a friends house, we use the floor joist in the basement. The only issue to getting the right angle is space. His ceiling joist are about 8 feet up so to get 30 degrees they need to be spaced 23-24 feet apart. If it's a semi permanent hang and you have the space you may be better off with a stand.
The idea of using a pipe to provide rigidity and allowing you to lower the anchor point so far sounds like the best option.