For hobby use, I would stick with suction. For a business, where time is money, and blasting is a constant part of your business, I would probably go with pressure because of the speed difference, and you already have the compressed air supply. Pressure blasting would be beneficial if you had a business of something like restoring old car parts that might have six coats of catalyzed automotive paint on it from the last 50 years.
I wouldn't buy from Vevor unless you knew that someone else in North America sells the same item and has parts available for it. Because you are going to need to buy parts, both typical consumables, and then other slower wearing items.
As said above, powder coating is essentially bulletproof. Years ago, someone gave me a part from an expensive office chair that had cracked and needed to be welded. "Sure, no problem.". It turned out that it was powder coated and I spent over an hour just blasting the small, cracked area and then two minutes welding it.