It isn't so much Zooplus cages as larger cages that are hard to carry
100cm cage would be absolutely fine on a 90cm table
A bit of overhang is no problem - when full the cage is quite stable.
You wouldn't want to take a set up cage in a car anyway. Everything ends up in a big mess inside it with the car movements etc. Also it isn't safe for a hamster to travel in a cage, they need to be in a pet carrier either on your knee or the carrier well wedged in so it can't move in case of sharp braking.
How often do you go away to need to take your hamster with you? If it's just once a year then it's not a problem. Sometimes for a holiday it's better to just leave the hamster in its cage at home and have someone come round to put food and water out while you're away.
But if you want to take your hammy to your presents once a year at Christmas eg there are a few options. You could either take a smaller, holiday cage with you and set it up while away (our hammy did fine in something a bit smaller than a duna multy for a week's holiday) eg 68cm x 45cm. The cage was easily portable then you set it up when you get there (bag up the bedding and toys and put them in at the other end).
hellobg mentioned the Alaska cage - this cage actually folds down flat for travelling. It's a good size regular cage for a Syrian, although some people end up upgrading to a 100cm cage. I prefer to have a permanent 100cm cage which I don't move. And then take a smaller holiday cage if needed. If you have a smaller cage already - otherwise it's more expense. But it would be hard fitting a large cage in a car anyway, whether it folds flat or not.
But the Alaska cage would be a good option for doing everything you want. Personally I think the Barney or Alexander are better for a Syrian as a full time cage. I wouldn't want to try and fit the Barney in a car though, even disassembled!
I have the skyline ted as a holiday cage (without the metal wheel!) It's actually being sold for half the price I paid for it at the moment! It has a built in house that is quite good so more floorspace for some familiar toys etc from the main cage. Some 11" wheels fit but not all. An 8" wheel is fine for a short period away.
https://www.amazon.co.uk/Skyline-Ted...ds=skyline+ted
If you got that, and a Barney cage, it would be about the same price as an Alexander cage. You could then use the holiday cage as a play cage for during cleanouts etc. The top and base nest inside each other on the Ted and it's easy to pick up when full also. Plus the top lifts off easily (sometimes necessary due to just having two small doors on top).