Take some/a lot of doing
Definition 1 of 2
Pro Tip 1/3Effort and Time
Indicates tasks that are especially challenging or lengthy. 
Learning the violin can take a lot of doing.
Pro Tip 2/3Resource Intensive
Used when something needs a great deal of materials or money. 
Funding a new library will take a lot of doing.
Pro Tip 3/3Persistence Required
Suggests ongoing commitment and determination are necessary. 
Becoming a chess master takes some doing.