Two indoor outdoor cat (Helena)

I have two indoor outdoor cats that need good homes.
They enjoy being outdoor and are great mousers i get gifts often.
But I do let them inside in the evenings during winter and back out once it's light.
I think they'd make great shop or barn cats as long as they have a warm place at night and some head scratches.
I would like them to go together since their are siblings 6 years old.
My landlord won't allow outdoor cats anymore.
And these guys would not be happy being forced to live inside.