Using the spare room for rabbits?

I apologise in advance if I say anything silly, my partner bought home two lionhead dwarfs and a hutch as we have recently bought our first home and he remembered having rabbits as a child. ( he is an animal lover and not trying to be cruel it was simply how he remembered having rabbits, not good I know) I could immediately see the hutch was too small so they have been free in the house for the last two weeks. I am trying to learn fast and do lots of research as I am experienced with hamsters and know how easy it is to make mistakes. My question is , I have bought a large cage which is being left with the door open and hay inside as a litter tray, we have a spare bedroom ( medium sized room) and I would like to keep them in there at nighttime to ensure they don’t hurt themselves on various household items. The spare bedroom is upstairs so I would need to bring them downstairs if they wanted a larger area to explore, but then all their water , litter tray etc would be upstairs? Will they eventually be able to come up and downstairs on their own? Would this be an appropriate way for them to live in the house?

Welcome to RU. Lots of members keep their bunnies in a spare room. I'd see its entirely appropriate & a good way to give them a safe space that is their own.

Personally I think it'd be fine to bring them downstairs regularly for more space & socialisation time with you. You'll soon find out if they find this fun or not. Bunnies are all so different its impossible to predict how much they will explore of their own accord. In my experience some are really full on. will leave no corner of the house unexplored, others seem to stick to the room that is their base despite open doors. Most bunnies, but not all, will happily manage stairs

Just to add if they are downstairs with you I'd still provide a small area with a water bowl & litter tray full of hay. Underbed storage boxes are popular as litter trays

Sounds like a fabulous set up. Rabbits soon learn to use stairs, so that won't be an issue. You can get them used to it by putting a pellet of food on each step to encourage them.

You could still use the hutch as a den in the bedroom - just leave the main door open (or remove it). It will provide a safe nest area and help to stop some of the hay wandering everywhere. Rabbits also like sitting on top of things, so they may jump on the top of it.

Baby gates are useful to keep house rabbits in / out of certain rooms. The bars are usually too wide for bunnies as they may get stuck in them (or escape), so you may need to put a fine mesh (eg a weldmesh panel) over the bars on one side. Cable ties are useful to fasten it on. You can get pressure-mounted gates, so no drilling required (try Argos, Lidl, Freecycle, Gumtree, etc).

The other thing to remember is that bunnies chew, so keep all wires, cables, chargers, etc well out of their way or protected with a cable guard.

Thankyou for all your help, I have put a separate water/ food / litter area downstairs, and am grateful to learn about bunny proofing techniques! Now feel reassured that they will be happy in their new room and exited to get to know our new members of the family! Thanks again