There are portable steel tripod frames that collapse and take up very little room storage wise. The ones I have seen have been custom made. In terms of affordable, that depends on what you consider affordable, as well as what tools and skills you have at your disposable. If you have the tools, strong mechanical skills and can accurately calculate the weight bearing requirements, you could make your own. In my opinion, wooden frames do not have the same versatility in terms portability and storage, but require less specialized tools to make. In either case, there are various plans available online. There are a few available for sale online that typically cost several hundred dollars, plus shipping/freight. In terms of those available for sale online, my advice would be buyer beware. Make sure you know what you are buying and who you are buying from. The same goes for plans that are available online. Do your homework, do your own calculations, and talk to people who have actually done it.

My first suspension frame was the sex swing people have mentioned. It is a great start for a beginner and can be taken down fairly quickly.

If you have the MONEY, buy a suspension frame. I happen to like:
Bonds of Steel Portable Suspension
with an over sized topper.

if you don’t have the MONEY and don’t understand engineering/construction, go with a playground based bracket solution. Topologist mentioned it earlier in his post:

If you have room for an A-frame design, these corners are affordable and make an ultra sturdy frame. Just add wood. Whole thing can be assembled for under $200 to any dimensions you choose.
If you understand the engineering, wood beam loading wood construction techniques, build a frame over designing it for static/dynamic load and force in any direction of movement. This means you need to know things like how to find good wood in a lumber yard, where holes should go and where cross members should be and how to attach them.

If I was in your shoes with a smooth ceiling, I would cut it open, put in a hard point. Alas, I don’t have smooth ceilings but these swirl pattern which I am in no mood to replicate before moving out.