A good weather station lasts five to ten years if you buy one with a solid sensor array. Cheap ones fail after a single winter, so we want something that handles high wind and heavy rain. Look for models with haptic rain sensors instead of the old tipping buckets that get clogged with leaves.
Most brands drop new versions in early spring. You don't need the latest model if it just adds a flashy screen. Last year’s hardware usually does the same job for a lower price once the new stock arrives.
This 18-month window is a firm deadline. If you still have a balance when the 0% for 18 months on purchases and balance transfers from date of account opening period ends, you will start paying the standard interest rate on the remaining amount.