Hi, I have worked with woocommerce a lot. I will create separate plugin without editing any of existing woocommerce code, it will hook into woocommerce_shipping_NAME_is_available filter before available shipping methods are listed, then will check order total weight and if less than 150 will exclude UPS from the list. Full milestone on start, release after all done, tested and working to your satisfaction. Please check my reviews for a referrence of my woo/wp development expirience. There are more than a hundred of excellent reviews rated 5 out of 5 with 99% completion rate, that is rare case when all employers were fully satisfied! That means I always seek for perfection, please compare to other freelancers with their average rating of 4.8/4.9 and ~80% completion rate.
I have successfully completed hundreds of different WP projects starting from minor theme or content updates to huge and complex WP plugin development and dozens of external API integration tasks. I have 11 years experience in Web Development, 6 years with Wordpress. Comparing to other freelancers who are spamming with their bids I am actually reading your project description and bid with precision only on projects I like.
I am located in Latvia, North Europe and I work mostly with employers located in Europe and North America.