Would like to apply for the E2 Visa and obtaining dependent's visa.

The investment must be "substantial" to qualify for an E-2 visa, among several other requirements.

Multiple H1 B visa sponsorship

There is no rule prohibiting a person from having more than one sponsor.

Probably not, but you should be prepared to explain any discrepancy.

Selected as the best answer

What address should we use to fill I-130 and G-325a correctly?

You should answer truthfully and as accurately as possible.

Regarding AOS in family based petition .

You would be better off sending in one comprehensive package.

Can I get my husband legalized?

There are several different possibilities, depending on how your husband came to the US and his current status.

Approved H1B in 2008, expired in 2011 it is unused. Is H1B valid under CAP Exempt & till which year?

If you would be eligible for a full 6 years of H-1B status at this point, you would not be considered cap exempt.

It is possible that your company could withdraw the appeal and refile a PERM, but this strategy would have to be discussed with an experienced...

L1B Blanket extension filed as Individual

Without a crystal ball, it is impossible to identify what issues you may face in your particular case.

Possible options to be on status till Labor Certification and I-140 approval?

Seek consultation with more than one immigration attorney if you dispute what your company's attorney is telling you.