I know she's not a giant, but my common boa Sonja is a good 8.5ft now. I never deal with her without someone else around. She weighs about 27lbs and is all muscle.
When I clean her enclosure, I always take her out and put her in a pillowcase. It's just safer for me and less stressful for the snake.
I've also found that rabbits, the 3.5-4lber size, keep her full for at least 3 weeks. They don't leave a big lump, just a nice thickening in her belly. When she was on rats years ago, it would take at least 4-6 large rats and then a week later she would be hungry again. I think you'll definitely see a big improvement when on the rabbits. Not to mention it will be less expensive, haha.
I would also see about getting a new enclosure or putting it lower to the ground so it's more easily accessible. Being on a stepladder and leaning over into a tank just doesn't sound safe.
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