Raz:
Not my area. Have a little knowledge, and you know what that means. Tao is right, is it total discharge he seeks or reorganization and repayment over time (7,11,13)
The dischargability of each of his debts depends on the type of debt (ie. secured/unsecured, etc.) and how the debt was incurred (tax, salary, alimony, child support, judgments based on intentional or negligent conduct, contractual obligations etc.).
If the debt is primarily contractual obligations, it will probably be discharged. Another issue is whether he is filing individually or on behalf of the corporation (or both). Not sure if the fact that he left no paper trail will matter much to the bk judge.
If he owes subs for work on jobs, they may be able to file mechanics lien against property owner. Check your state law. Basically, after he files, creditors will have an opportunity to question the debtor re his assets.
Hope that helps. Again, this aint my area. Proceed with caution.
Ed