I dont think you need those expensive flashcarts.
I have a 3DS XL and I was able to softmod it using this guide
https://3ds.guide/
There are alot of steps to do, but its very simple, double check everything you do and you are good to go with CFW on your 2DS.
Dont forget to read everything, and scroll down the page and click on get started, choose your system and start with the guide.
The guide works on all 2DS and 3DS systems as the guide says.