Hard money vs. Old 401k?

[Dymond Shafer]

Hello BP enthusiasts...My first two flips were successful, but like most, raising capital is a challenge.  For our next two flips (both under contract)-- advisable to use Hard Money or my old (separated from employer) 401k?  Hard money is expensive, yet I get penalized 20% for an early withdrawal from my 401k.  

Lastly, deposit capital directly into personal account AND THEN into my LLC account? Or okay to deposit directly into my LLC account? I'm slightly aware of the dangers of commingling retirement funds/personal funds.