This is from the most recent report from Open Secrets on the Trump campaign. It shows that Trump, though heavily invested did not “self fund” his campaign as he said he was doing. This is an important point as Trump’s self funding was a significant part of his appeal for many. The idea that he owed no one was powerful.
To a large degree the “Trump independence” meme does appear to hold true even if Trump only self funded 1/5 of his campaign.