¿
Yes, it is perfectly fine to set
#CARGO_HOME and
#RUSTUP_HOME to your custom paths
before installing #Rust

¿
Yes, it is perfectly fine to set
#CARGO_HOME and
#RUSTUP_HOME to your custom paths
before installing #Rust
¤
and if so
is it wiser to use dot as follows
#CARGO_HOME: J:\env4xi\.cargo
#RUSTUP_HOME: J:\env4xi\.rustup
¿
Add two new User Variables
#CARGO_HOME: X\cargo4xi
#RUSTUP_HOME: Y:\rustup