How much merit do you need? Lehigh is not known for giving much merit aid, and even need-based aid is not among the most generous schools.
Lehigh’s net price calculator does not include merit, what does that estimate for your COA? https://www1.lehigh.edu/admissions/net-price-calculator
Looking at Lehigh’s CDS for Class of 2023 (section H2A), 55 of 1,406 freshman received a non-need based merit award ($9,909 on average). Would that $10K make Lehigh affordable, using the NPC’s estimate of costs? https://oirsa.lehigh.edu/common-data-set
There are enough tools here, and for most schools, to have a good indication of whether a school will be affordable, or not.