Hi @roberto.carballa1,
you are right, minimum area of individual order is 0.25 km2.
You will need to purchase at least 100 EUR worth of consumption in advance, but if there is something remaining after end of use, we will refund the remaining budget. It’s just an accountancy matter.
Note that you will also have to subscribe to Sentinel Hub to use its APIs to access these data.
There is no trial access to this dataset, but if you purchase a quota and then decide you do not want to use it, we will refund it.
Best,
Grega