The phrase 'will be difficult to reach' is correct and usable in written English.
You can use this phrase to indicate something that may take a lot of effort or time to achieve. For example, "Our goal of becoming the top-selling company in our industry will be difficult to reach."
But a comprehensive deal will be difficult to reach.
"It will be difficult to reach a deal, and we are likely to continue the strike".
Even if you decide your ideal will be difficult to reach immediately, there are likely to be alternatives out there that can further your long-term career goals.
"If Israel does not halt these activities, it will be difficult to reach the political settlement," Mr. Abbas said at a news conference before the meeting.
Because States have different strategic cyber-capabilities and different vulnerabilities to those capabilities, it will be difficult to reach international consensus with regard to the UN Charter's application to this problem.
And Mr. Putin returns to Moscow, where he must prove that he is the democratic leader he advertises himself to be, one who wants to take Russia into Europe, a goal that will be difficult to reach as long as the partisan war in Chechnya continues without negotiation.
They're not far from the top five and that'll be difficult to reach as there are a lot of big games to play, but let's get out there, have fun and enjoy ourselves.
Smart students are intentional about keeping distractions away, whether it's by keeping them in a separate room from where they're studying or anywhere it'll be difficult to reach on a whim.
Conciliation will be difficult to achieve, however.
"He will always be his own person, and what is offered by the landscape beyond the fence will always be difficult to reach".
Furthermore, a detailed understanding of genetically caused β-cell dysfunction will often be difficult to reach without also understanding the simultaneous and confounding effect of the mutation in other islet cell types and/or other tissues.
