Retirement tax questions

Thank you.  I'm looking to take the hardship this year for a house purchase.  I think I will be ok without paying estimated taxes in 2018.  My salary is such that taxes paid have been consistently above the prior year, and expect to pay at least 100% of the prior year tax.  $50,000 hardship withdrawal is what I'm looking to take, and I rather save up for my tax obligation, then to take additional funds for taxes.