Humble beginnings
Below is my 30 year old contraption made from mostly hardware store materials. Such as nuts, screws, aluminum angle stock, plexiglass, and a few other things. I built it while living in an apartment and I designed it so that it was mostly a closed system. It is not entirely closed because I wanted some air to flow through the booth.
My reasoning for a closed system was to serve two main puposes. That being, low fuming, and low dust drawn into the system. But mostly, to reduce fuming. I vented the system through a window insert I could easily install and remove. The insert was made from particle board. At the time, I used a simple squirrel motor fan that I picked up cheap from a local science store. I estimate the cost of materials for this booth at around $100. Not cheap for the time, but much cheaper than buying a commercial unit.
The front panel can be left open or I can choose to spray with it closed.
The system worked well but when I moved into a condo, venting required a longer reach, and the meager squirrel blower I had was woefully inadequate.
In comes the next upgrade. I purchased a portable booth, pulled the blower assembly, and I attached it to the back of the booth. I think I paid $120 ish for that. Suction improved but over time... I began to realize the meager computer fan was not up to the task either. It was this assembly that I found on the floor last Sunday.
The third upgrade was when I purchased an in-line blower. I mounted it at the end of the line. You can see it in the first image. So, I used both blowers in tandem. This did help, but only marginally. I was able to get by with it.
A few posts back I mentioned revamping my Condo. Below is a bench that I had in room where my work office station is. Originally, my intent for that bench was to use it for model assembly. The hope was to keep me out of the rather dank basement. For some reason, that never really took hold. I tried it for awhile but the bench area is too small for my needs. What is worse, it was not really good to work at from a sitting position. It can be done, but it is not the greatest. It was too high and it's designed to work from a standing position. That said, it should be fine for my airbrush work. So... it sat, taking space, collecting dust. Thus, I moved it to the basement and rather than using a folding table I will use the more solid bench. The now defunct folding table may one day be repurposed into a model photography station.
In this image you can see the bench is positioned in place and the old booth is gone. The latter is in pieces waiting for disposal. Good bye old friend.
A total reset
Assembly begins.
Short of the mods that I will do, out of the box is done.
So what did I buy? Click on the link.
https://www.amazon.com/Paasche-HSSB-22-16-Hobby-22-Inch-18-Inch/dp/B0038DANR6?th=1
https://m.media-amazon.com/images/I/71koZT3V4iL.pdf
And why did I choose this one?
1. It offers a working space similar to what I had before. Though, slightly smaller. I was a bit concerned about that but once I got it assembled, it seems perfectly adequate. Truth is, my home made unit had more space than I needed.
2. The price point is on the low end when one moves beyond the commercially available portables. And in my opinion, this is a major step up in value from those.
3. Reviews are mixed about air draw. Some say it is not good enough, others say it's fine. I tested it a little and it is definitely better than what I had. The blower assembly uses a much larger fan and it does seem to draw. But... I expect that might change rapidly once the filter starts to clog. Don't take that to the bank, though. I won't know until I use it more.
4. The build quality seems solid. Certainly, much better than my wiggly booth.
5. This booth has a flat face to its front. That will allow me to fabricate and use an opening door, like on my old unit. In short... build a mostly closed system that can be used either way.
Final thoughts
1. The booth needs lighting. They should include that but don't. I will purchase and install an Led light bar.
2. I was mentioning air draw. Interestingly, when I ran the unit and I placed a piece of plexy over the face, not totally covering, suction literally pulled a LARGE sheet of paper from the bottom of booth and into the fan filter. The paper is almost as large as the bottom floor. I was amazed. My old one would never do that. So... this baby sucks! 
3. I am excited about this upgrade because the potential is there. Btw. I am fairly certain I will remove the inline fan. I don't think I need it and to be honest, I am not convinced that the two don't sort of fight each other. Removing it will eliminate one dangling cord. Additionally, once I get lighting installed internally, I can remove the dangling lamp. Either way, the lamp will do no good. It was only good with the clear plexy of my old booth. Lastly, the dangling outlet-strip will go too. My bench has a built in outlet. I just need to run a cord from the power socket to the bench.
The whole aesthetic will change.
And so there you go. That is more than you ever wanted to know about my spray booth journey.