l have one - its a Lanaform Power Plate - they do not take up much room - and you are only supposed to use it for 10 mins three times a week. You gradually build up the intensity. Mine cost me about £160 - but l think they are cheaper now. Had it for about 15yrs. You could always see if a local gym would let you try theirs. lt certainly works the ‘core muscles’ and you stand in different types of yoga/pilates positions. lt works all the body - without you having to do much at all - this is why it is often one of the favourite machines at the gym - apart from the vending machine!! Mine is very sturdy - so l can stand well on it and hold the handle part.
Have you looked at any online.