To answer your question, I would first ask if you can share one with someone near you? Broadforks are not needed every day and can easily be shared. Also, if you had one, would you use it? What gain would you have? In other words, Will lit save you work, save your back form injury, complete a task you could not otherwise achieve... For me, tools that help protect me from injury are worth it. (I was soooo much more invincible in my 30's!)
The broadfork in your photo looks really delicate. I would not go for that style.
I have two styles of broadforks. I bought small one that was affordable and helped me break up some ground but it was not all that effective for the bigger jobs. I use it for small jobs and for helping at others places. It has 12" long tines and is rather light. It has a place to step on that is traction friendly. Stepping on it helps it to sink in to the soil. It has a single handle that comes off of the shovel head and comes together in a kind of flattened semi-circle at the top. This allows me to use both hands to pull it back. The leverage is pretty good but it is not for serious work.
My larger one is really not mine. My friend Steve made it and has given to me on long-term loan. It is well appreciated This one was welded from heavy steel and the weight makes it easier to get down deep in the soil. The tines are about 18" and are tapered so they slide right in. It has a super long single handle which makes it easy for me to pull back after stepping on it to sink it in. The long handle makes for more leverage. It is a bit hard because the handle is square so it is uncomfortable to grip. I keep meaning to wrap it in pipe insulation or something.
I like that both of these tools have a single center handle. The others that I have tried had handles on the outsides. If you are not a big person, this can be really hard on the upper body. Furthermore, if it is heavy and you have to lug it across your land, one handle up the center is better than two spread out.
Both tools are handy and help improve porosity which is an issue in amending my clay soil. This is not to say that I do not encourage worms and microbial activity. It simply means that I am accelerating the process.
I am not sure how much it cost Steve to make the one that he did but if one could weld, I could see this as a good project. Last I heard, he was still making them in our area.
Okay, I hope this helps.