Any platform you place your tt on will affect it's sound. Therefore, you should choose that platform on it's sonic interface with your rig, not on it's 'height potential'. If you have a mate who's willing to allow your hobby gear into-well, I'm not sure which room, but presumably not a specific 'music room'-then I'd appreciate that fact, and realize that bending or crouching, if necessary, is the price to be paid. Seems a pretty small price.
When she starts demanding that you sit on the toilet when you take a leak, that's the time to put your foot down. Until then, a little give-and-take is key.