[QUOTE=mArvAlcao17;1198131]"but R4 isn't a good option either"

R4 may not be an option for you, but to conclude that R4 is generally a bad choice, will be incorrect.
For all countries where ASN has not chosen to allow "home-made 4WD" or made its own rules / class, such as AP-dit or datt, R4 is the option it was supposed to be.
If an importer or dealer organization wants to promote itself within rally, but represent a car brand that has not homologated an R5, they can build an R4.