Make sure the greenhouses are bolted down securely. They may look heavy, but they will move in the wind. Maybe not enough to blow over, but they will 'creep' ever so slowly, twisting the frame and putting pressure on the glass. Choose your spot carefully. Maximise the amount of sun it will gather for Sarracenia. Make your base larger to accommodate water butts and maybe done outside trays for growing purps. Make sure you are buying the biggest you can afford. You will fill it up quickly, and an extra greenhouse/base if far more costly!