have one's work cut out

have (got) (all) one's work cut out (for one) (to do sth) {often in future tenses} (have a lot of very difficult work to do; be facing an obviously difficult task, one which is as much as one person could possibly handle) — ≈ работы по горло; ≈ забот полон рот;≈ работы — начать и кончить; ≈ работы непочатый край и т. д. {акцентируем в переводе непосильный объем}|| оказаться перед трудной задачей; трудная работа обеспечена; отдыхать не придется; нелегко придется {акцент делаем на трудность задачи}

Example 1: This is a very large house to manage, so I have my work cut out for me. (answers.com)

Example 2: I've got my work cut out with this job.

Example 3: You're really going to try to decorate the whole apartment in two weeks? You've certainly got your work cut out for you!

Example 4: If you want to be a chartered accountant, you have your work cut out for you. — ...сидеть сложа руки не получится; работы будет невпроворот..

Example 5: ...I had made a new chart in the back of my notebook. It said GOOD DEEDS at the top, and the days of February were numbered down the left margin with a line drawn out from each. I had done this laboriously, with a ruler, before leaving my cousins'. We would be gone for a month, and I planned to do a good deed every day-thirty good deeds, which ought to be enough to bring even Mama and Daddy back together. I had my work cut out for me, though. It would be a challenge. They sat as far apart as possible on the big front seat, as remote from each other as planets. They were both smoking a lot (Mama, Newports; Daddy, Winstons), making the air in the new Cadillac dense and blue and wavy. My eyes watered all the way down through South Carolina and Georgia, until it grew warm enough for us to crack the windows. (Lee Smith, Live Bottomless)

see also
[have too much on one's plate]
[tough row to hoe]

This expression alludes to cloth cut out to make a garment. While having someone else follow the pattern and cut out the proper bits of cloth from which to sew a jacket, for instance, would no doubt be helpful, the most arduous part of the job is actually sewing all the pieces together. Today the phrase can be applied to any sort of work or effort, and "to have your work cut out (for you)" means that your task is clear and ready to be tackled, but all the more daunting because you can clearly see exactly what needs to be done.

"To have your work cut out for you" is a remarkably old phrase, dating back to around 1600, and occurs in Charles Dickens' "A Christmas Carol" as well as the works of several other famous authors.

be cut out for (naturally good at; built to do well)
Not everyone is cut out for sth/to do sth — каждый (с)может, не каждому под силу

..... I don't think I'm cut out for swimming. My bones are really heavy.
.....Not everyone is cut out to be an engineer, accountant, or a physicist - or for that matter even graduate high school.
.....Not everyone is cut out for working in stunts.