The phrase "costly endeavor" means that a certain activity or project requires a lot of money or resources to be successful or to complete. Full definition
It's a very costly endeavor, and it's not worth it.» (entrepreneur.com)
Intellectual property and copyright laws make option 3 a cumbersome, time - consuming, and potentially costly endeavor, so every good online designer has a cache of open content repositories at which he / she «feeds». (elearningindustry.com)
Underlying her look at family size, wedding expenses, backyard chicken ranching and other costly endeavors is the knowledge that while none of us will ever have all the money in the world, many of us have more than we need and don't realize it. (bookpage.com)