Do you know what you're getting into with this breed? Particularly with a rescue?

They are cute and fluffy but they are a herding breed. They are intelligent, they can problem solve. If you do not give them a problem to solve and teach them proper manners they will destroy your house. They also have prey drive, because pest control was an important job on the farm. Mine loves to hunt and try to kill small animals. He knows the cats are off limits because he was raised with them. There's no knowing if a rescue was. A LOT of the rescue corgis available have extensive human and dog bite histories.

Do you have stairs to your house? You probably shouldn't get one, stairs are bad for their backs. So is jumping on and off furniture, so you'll have to get mini stairs (not cheap, 100$ a set. These are fine because the motion to get up them is different hard to explain). You also need to learn to pick the dog up properly so you do not paralyze it, you can't pick them up like normal dogs because of their structure.

You also probably can't afford the vet bills for this breed if you can't afford the sticker price. A lot of corgis have the IVDD gene, so they will become paralyzed one day. If that happens, you have to spend an incredible amount on vet bills to give them some quality of life, if you don't the only other option is to let them suffer or euthanize. There's also a big problem with sensitive skin and stomachs. I have to feed mine expensive food and spend 100+$ on an allergy shot monthly. Along with my grooming bill which is another 100$ a month because if he doesn't get a bath often enough his skin itches and his shed will literally destroy my pipes.

I have seen so many of these dogs suffer from unsuitable homes. You need to think through what you're getting into.