How do people LEVREAGE a lot of capital for business assets like Donald Trump did with bonds?

Some of these peopel are able to issue bonds or get debt and are eventually able to actually pay it back (maybe not in trumps case) how do business leverage a lot for business assets even like real estate which is a business assets and real estate companies
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you have to have assets for collateral -like Trump
and you must have a record of paying debts on time as he did up to a point.