Perhaps you could buy a trash can and stack the plants in it. The big problem with tender plants is frost. Leaving an African violet, for example, in the trunk of your car would be a disaster. You may have to carry just the most sentimental and cherished plants. Maybe W will bring some up for you on Air Force One.
Poinsettias are like thoroughbred horses, pretty but the parameters for care are narrow.
They are breeding varieties of poinsettia that can be used for cut flowers, maybe this is an issue we can answer in the Home section. The flower will have a central boss surrounded by anthers each loaded with pollen. Brush the pollen from one blossom onto the central bit of another. Easy as that. Once you do that, the bloom will rapidly fade and the base will swell.