Elon Musk is ‘scrambling’ to find backers to finance his $43 billion bid to acquire Twitter, according to the New York Post, citing anonymous sources.

The complex deal would raise debt both against the company, and possibly his own stock – and would include a large cash equity infusion from co-investors.

Still, insiders say Musk appears to be facing hurdles in raising the money. In addition to doubts about whether Twitter is worth the $54.20 a share that Musk offered on Thursday, sources said some investors appear skittish over his pattern of unpredictable behavior and taste for controversy.