So this is a big one, and will largely have the most impact on how much you spend and how you structure your program. 

Let’s look at this from a philosophy standpoint. If we are a compound/closed kinetic chain movement based program we will need to build our weight room around racks. This may come off as a very obvious statement, but if that is not your philosophy you should look elsewhere besides racks first. Because that can be a costly and space consuming mistake. 

Then we have to classify what subcategories your philosophy breaks down into. If you are weight lifting focus you will need space in front of the rack. Preferably a half rack, or even squat stands would be better in giving more space outside the rack. If you have a powerlifting focus, you will need bar catches and less room outside of the rack. So a full rack may be better. This will come at the expense of more space being used, but that is offset doing most of your work inside the rack. 

Finally, we will need to discuss if you are staying at your station set up versus using the entire room set up. Staying at your station may be more efficient, but it does lock you into a set space and may limit your options exercise-wise to just barbell movements. This may require a higher utility rack that allows for lots of add ons to give more than just barbell exercises. If you are using the room, you will need a ton of other equipment. So having a barebones rack that does not have a lot of customization is a better option. There is a logistical aspect of how many athletes per group and how much supplemental equipment you will need to consider with space relative to racks with using the room focus. 

I say all this based on the premise that you will pay more or less based on how much you depend on your rack for training. If you have access to a small space, this could become a real estate problem. If you work in a large space this could become a financial problem. Regardless of space or money, you will need to pin down your philosophy before investing in a rack. Money and space will be taken, the real question is by what? 

Philosophy is important to start with why you might purchase a certain style of rack. It matters if you have the right tool for the job. Personally, I build my programs around olympic lifts for athletes and prefer half racks. I also prefer to use the entire room with pairings, supersets, and various exercises with other tools such as machines, medballs, kettlebells, sleds, maces, clubs, etc. Having space occupied by full racks is counterproductive. 

But half racks are also cheaper. That saved cost allows for purchasing other tools such as machines or accessory equipment. No matter what, you get what you pay for. Higher quality things cost more money. But with that comes increased lifetime value, aka they last longer. The problem with things lasting longer is that means you are more locked into what you purchased. So you better pin down your philosophy and how you use the room first.