"Costly" means that something requires a significant amount of money, time, effort, or resources. It implies that there is a high expense or sacrifice involved in obtaining or achieving something. Full definition
A tiny investment in great books will give a big return and avoid costly mistakes in your real life. (financejourney.com)
Those who are obese are more likely to have other existing conditions, making insurance more costly for everyone. (creditdonkey.com)
This makes the application process less costly in terms of time and travel as would be in the case of traditional physical offices. (nation21loans.com)