During the due diligence process I found out that the 5th unit didn't have a certificate of occupancy, so legally I couldn't rent that apartment. 

As a home inspector if I suspect a roof issue I recommend my client get a roof certification not a roof inspection.

I can let you know if it's ever been inspected and what to look out for.MA real estate laws say that you can't rent to a family with kids under 7 unless you have a lead certificate on file with the state and the anti-discrimination laws say you can't not rent to a family because they have a kid under 7 (even if it's because you know there's lead paint), so they basically made it so that any rental with more then 1 bedroom has to be deleaded.

Bank just printed certificate of deposits.

One way to prevent that is to get an estoppel certificate.

Once you qualify either of these 2 ways you must still complete certain certifications.

Just make sure before the roofer begins work he gives you a certificate of insurance and you are named on it.

Banks (at least in Texas) generally require the certificate of formation, certificate of filing, the EIN#, and the LLC Operating Agreement listing the members that have the rights to be able to open an account and withdraw money from the account. 

In Philly you'll provide the lease, lead paint disclosure, partners in good housing pamphlet, and rental certification license.

Has anyone ever obtained a secured loan from a bank using a pool of Louisiana Tax Liens (Tax Sale Certificates) as collateral?