Who pays for President Trump's impeachment defence? Is it the US state or does President Trump need to pay for his own defence?
Personal lawyers are paid for by the President himself while the federal government pays for lawyers from the Office of the White House Counsel (see this WH document for their salaries).
Legal teams outside of the Office of the White House Counsel cannot be covered using taxpayers' funds:
The White House did not respond this week to requests for comment about how Trump would pay for his outside legal team, the cost of which cannot be covered by the federal government.
(excerpt above is from May 2017, not regarding lawyers from Trump's impeachment defense team)
Claire Finkelstein, University of Pennsylvania Law School professor and director of the school’s Center for Ethics and the Rule of Law, told us that “there is currently no legal provision that would allow President Trump to receive assistance with or reimbursement for his personal legal fees in defending against either obstruction of justice charges or charges relating to potential collusion with Russia in subverting the 2016 election.”
It's worth noting that Bill Clinton had to personally pay for most of the legal bills of personal lawyers that defended him during his impeachment.
He and his wife, Sen. Hillary Rodham Clinton, D-N.Y., owed millions to lawyers who defended them during the years-long investigation of Whitewater and other business dealings and helped in the Monica Lewinsky impeachment mess.