[chimeracoder]

> Proxies are allowed. We encourage the use of easily recognisable proxies as long as they are undetectable under sleeves and are easily recognizable and nicely made, but no counterfeits!

A proxy can be as simple as a basic land with Sharpie writing on it, so this format is by definition as affordable as Magic can ever be.

[JimWestergren]

Exactly. Except that they should be easily recognizable and nicely made. So for example a basic plains that you draw over and make look a bit like the card is very recommended.