From 2016 Trump has been sued at least 60 times for not paying bills.
http://www.foxnews.com/politics/2016/06/10/dozens-lawsuits-accuse-trump-not-paying-his-bills-reports-claim.html
Trump said he only withheld payment when he was not pleased with the work. He was sued at least 60 times
Dozens of lawsuits accuse Trump of not paying his bills, reports claim
USA Today also reported, citing data from the Department of Labor, that two of Trump's now-defunct businesses were cited 24 times beginning in 2005 for failing to pay overtime or minimum wage. The cases were settled when the companies the Trump Plaza in Atlantic City and Trump Mortgage LLC agreed to pay back wages.
The paper also reported that more than 200 liens have been filed against Trump or his businesses by contractors and employees dating back to the 1980s. The claimants include curtain makers, chandelier shops, cabinet makers and even Trump's lawyers who represented him in prior cases.
The USA Today report cited one case involving a 1990 project at the Trump Taj Mahal in Atlantic City, during which New Jersey regulators found that Trump had failed to pay at least 253 subcontractors in full or on time.
----------------------------------------
"Part of how he did business as a philosophy was to negotiate the best price he could," O'Connell said. "And then when it came time to pay the bills," Trump would say "'Im going to pay you but Im going to pay you 75% of what we agreed to.'"
------------------------
And there is more if you can believe it.