Is a basement in a single-family house useful or rather too expensive?

who on earth puts strollers and bicycles in the basement?

Yes, strollers are probably most practically placed under the stairs, where there is no access to a basement.

Garage is currently full. 2 cars 2 pallets of plaster 1 pallet of cement Wheelbarrow A few sacks of natural stone mortar 1 plastering machine Shovels, pickaxes, and co. Nothing that belongs in the basement

In the garage there are 4 shelves full of all sorts of things, a workbench, a mason's tub, inside it a sack of fertilizer, two wheels, a tricycle, a kickboard, a beverage fridge, a trash can, a yellow bag, a wheelbarrow, a ladder, a sack truck, two crates of Coke, a seltzer, some schnapps, no beer, that just makes you fat, and there is still some space left, definitely not for the car, it really doesn’t need to be in there. it is galvanized and painted.

I forgot the yellow bag
The tricycle, the watering cans, and the mortar tubs

I have the yellow bag
Forgot the tricycle, the watering cans, and the mortar buckets

What exactly are the mortar buckets? Even Google doesn’t help me with that. It only shows me meatballs or asks if I mean skids.

Really, the word Mörtelkübel is dialect? Mörtelkübel in standard German