It's cruel to kep them on their own. Animal welfare has increased since you were a child and rabbits are still the most neglected pets.
The space that they live in should allow at least three hops and be at least two foot high.
They don't just wee, they spray because they become sexually active before you can get them done.
They stink. For an indoor rabbit you are looking at as much work as a small dog. They need cleaning daily.
I buy Pets at home pellets, they were rated good, on the rabbit welfare site.
I've dedicated a room for my three over Winter. They are noisy.
What is the cupboard painted with? Some paints are toxic to rabbits.
Luckily mine aren't chewers, otherwise going behind the washing machine etc would be dangerous.
If I use plastic bowls, mine just tip the water/pellets out and throw them around the room. I have to use heavy stoneware.
The rabbit might go for the dog, which might not end well. I've got three cats, my rabbits love one of them, tolerates the other, but they bully the other one.
I love them. But they are hard work amd will live for another 8-10 years.
Have you got help if you want to go on holiday?