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Yes, you can do that. In fact, they will enjoy the extra space.

It depends on the variety. Generally, they are too delicate for zones 5 or less, but if you have a hardier variety it may be ok. Do you know the variety?

Many people have success growing parade roses indoors in their sunrooms. They usually keep them in a spot where they get good sunlight but not direct sunlight, which may be magnifyed by the glass of the sunroom, thus causing leaf burn or scorch. They also use the potting soil that has the moisture retention crystals in it to help keep moisture in the root zone. Parade roses can also be grown outdoors in the garden bed. Here is an article for the outdoor planting of the parade roses that will help with that: https://www.gardeningknowhow.com/ornamental/flowers/roses/how-to-care-for-parade-roses-outdoors.htm

It sounds like you have either a mini or mini flora rosebush. I am not sure what her name might be at this point. https://www.gardeningknowhow.com/ornamental/flowers/roses
Stan the Roseman :o)

You can buy a product called Liquid Fence and keep it sprayed with that. Also in times when you are not going to be around, make a cage out of some heave duty wire mesh or chicken wire fencing. Place the cage over the rosebush and stake it down well. I would do both if you have alot of elek activity going on. Some folks I know even have motion activated sprinklers set up so that any movement sets them off, sometimes it works to scare the elk and deer off.

Stan the Roseman
Consulting Rosarian

It should be fine. Put a tablespoon of superphosphate in the planting hole and mix it in with the dirt in the bottom of the planting hole. That will give the root system something good to munch on even over the winter months. Also water it in with some root stimulator added to the water as that will help get the root system going and reduce any shock. Once the weather gets colder, mound some soil up around the base of the rose a bit too.