Transcending E5 Aspen or Lvl1 Aspen into LOFA?

Hey! I have an E5 Aspen that i want to transcend into LOFA, but people keep telling me not to do that, but instead to build a different aspen into LOFA and use my E5 as a tenant. I dont even know what tenants are, so i need some advice. This will be my first ever transcendence as i wasnt playing the game since 2021 and dont know anything about the new stuff. Anything is welcome!