In short: I live in a three story house next to the beach (~140 m2) which means that my kids carry sand into the house (can’t be avoided) and I have to vacuum across three stories and two staircases. In essence I vacuum more or less daily.

I currently have a Bosch cordless vac and a Miele corded vac. However I’m not really satisfied with the setup: The former has too little battery life and too little suction power and the latter being too much of a hassle with the stairs. Therefore I’m wondering if there exists a good hybrid between the two?

I was wondering something like a portable but corded vac good for the case? I don’t mind there being a ‘second’ compartment for the dust bin etc. that I have to carry around but on the Miele classic vacuum it’s simply a little too heavy to be a pleasure. Further I think I should be corded. I was thinking about a ‘backpack vac’ or whatever they’re called but might be too much of a hassle. Like the Nilfisk GD5.

Or maybe a smaller workshop vac from Bosch, Karcher, Makita etc (but the handheld ones are often battery powered?)

Located in Denmark - no budget.

Any advice or experience on the topic?

Thanks in advance!