There is at least one way to buy from VERY interest-free over 6 months.
The clock starts running once you place the order and VERY's version of 6 months is 6 x 4, 7-day weeks or 24 calendar weeks.
1,500 / 24 = 62.50 / week. Can you afford 62.50/week with possibly no income other than social welfare payments? Pay it all off in time and there is no interest to pay. Compare prices on Apple's website and VERY's and 20/40 euro is the biggest premium VERY charge, sometimes they sell at exactly the same price, but VERY's product range is limited and there are no build-to-order systems.
I'm guessing at 1,500 maybe it's a 1,489 M1 Mac mini with 16GB RAM and 1TB SSD). Do you have all the software you'll need? What about monitors, keyboards, pointing devices, printers, external storage for backup, etc. Will your software run on the ARM SOC or is it all compiled for Intel? You can use the Rosetta emulator but it can be slow with big programs (slow is a relative term here).
Maybe post a list of what you need and we'll give it a once-over if you think that would be helpful.
There's always this -> https://www.very.ie/apple-macbook-air-m1-2020-13-inch-with-8-core-cpu-and-7-core-gpu-256gb-ssd/1600533403.prd