Edit: Moved from a help request for installing multiple DE's/WM's.
Good advice.
However, you will likely not get any advice from Garuda staff regarding these type of non standard installs. The reason is simple, this often results in a buggy system that inexperienced users are not capable of managing themselves.
This leads to a black hole one way trip to the support nightmare alternate universe. We do not provide support or advice on these types of installs precisely for these reasons. If you go this route don't expect support from official Garuda staff in the future.
Have fun playing with your system. 