I just imagined if you had money it wouldn't be a problem.
If that were the case the economy would be booming. Unfortunately, Argentina insists on making problems.
You can always get lucky and find ways around any obstacle like this, but it would be naive to think you will always end up with exactly what you need. Maybe for your personal life here it will work more often than not, but for a business... that’s another story.
Once you have an idea/ business in mind you need to think how you will make it work (eg as a monotributista or set up a local persona jurídica like an SA or similar) Having a local entity could be the solution to getting guaranties etc. I’m not sure with a student visa and thus temporary residence you would be allowed to be an executive director of the company to be able to register it - perhaps you’d need a lawyer or local partner to appear on the papers.
The beaurocracy is a real pain in the ass for everyone and not something that can just be ignored altogether by businesses.
When suppliers (Beverage distributors, Coffee, Importers etc) set you up in their system you will need to provide a lot of documents etc. When you want to set up a POS or ML or bank business account to get paid you will need to provide a lot of documents etc. When you want to set up the company or get that all important CUIT, you will need to provide a lot of documents etc. When you want to hire someone you will need to provide a lot of documents etc. When you want to receive a dividend or salary you will need to provide a lot of documents etc. When you want to connect the electricity to your business, you will need to provide a lot of documents etc.
In short, not sure how far a student visa and bag full of cash will get you if going it alone unless your idea of a business is just peddling trinkets from a blanket on the sidewalk or simply working from home on a very small scale.