Is it really bad to have a 6ghost team?

Aegislash (save le king)
Drifblim (Helia)
Chandelure (Hecate)
Haunter (no nickname :( traded)
Rotom/w (also traded)
Trevenant (Yggdrasil)

I know it probably wont be competitive... but I enjoy it so much, special walls will reck my shit along with pretty much everything but... I just enjoy ghosts so much.

Will they work at least as a battle instituse / Maison team? anyone with ghost team experience wana lead me in a decent direction or anyone with knowledge of pokemon in general?

Should I stop this now before I EV train etc

I am not 100% sold on Drifblim but it is the only ghost I know of that can fly, and I thought Helia was a smart name too :P