I took several workshops (not with the resources you mentioned). All of them were free, but I believe the next time they will hold them, they're going to charge because of the amount of time it took.
Was it worth the time and money?
The first one was on viewpoint. We wrote scenes with all the different viewpoints. That turned out to be extremely helpful because it introduced me to omniscient viewpoint, which was what I needed to be writing in.
The one on description: I almost left it four times. It was slanted way over into fantasy, so I had trouble relating to the exercises. It was also not a good fit for me. I was at a different place than the other writers--I wasn't excepting basics of description, but that's what I got.
The one on outlining: This was supposed to be a pantser-friendly outline, but I had trouble with each of the steps. Two I didn't understand at all. One of the areas I had trouble with was that I can't put characterization into any prep work (when I gel to the idea, the characters are still only placeholders. They don't even have names). The instructor kept telling me to go outside of my comfort zone, like I was resisting trying. It ended up being a very frustrating experience, though the one thing I finally did realize coming out of that workshop was that I can't outline at all.
Was it more beneficial than having a handful of beta readers?
Again, the omni workshop was where I got the most out of it. We were all going outside our comfort zones and doing viewpoints we weren't ordinarily use. Everyone's comments were far different than the other two. In the description workshop, I don't think anyone knew what to do with me, and in the outline workshop, I had multiple people trying to explain the outline to me. That sounds like it was helpful, but often when you have an unusual problem, people tend to explain how to do it exactly the same way as the last person, as if you're not interpreting the instructions properly. Another writer was having similar problems--I suspect her process might have been similar to my own--and got a lot of the same. Neither of us understand how to do the outline by the end of the workshop, though everyone else was merrily able to do it.
Other comments: Make sure you do the exercises properly. One of the pitfalls of the viewpoint workshop class was that many people simply took the same scene and changed I to George. I revised each scene to try to make use of each viewpoint's unique aspects, and that's one of the reasons I really clicked with omni.