H4 ext & H4-EAD application on H1b transfer

Yes this is permissible but not required as the H-4 is independent of your employer.

Can my wife on EAD trough my E2 visa get an independent visa because she just become a licensed healthcare broker in Florida?

I recommend she consider a labor certification through another employer if you think your E-2 won't be renewed.

you may only recapture time outside the U.S. or in the U.S. in another status. I assume you continued to work for your H employer during the...

Yes you may work for a company outside the U.S. Check with an international tax accountant or attorney on your tax question.

Can I still apply for a citizenship of my Permanent Residency expires April 2019? I was told its too late, to renew my residency

You can renew your PR card any time within six months of expiration. If you became a PR before you were 18 and one of your parents was a U.S....

I concur with my colleagues with respect to the 240 day rule.

hard to know without reviewing what you submitted. You may want to include a letter from your employer including how you are supervised and...

Is it possible for only 2 out of 4 members in family immigrate to the U.S under the sponsorship F3 by grandma?

No one is required to immigrate. Yes your Dad and you may be the only two to immigration; however you would need to qualify under the Child...

I am applying for H1B visa, my current visa (F1) is on old passport and should I put new passport number or old?

I would put the current passport number but indicate on the Addendum page the previous passport number which includes the visa. Include copies of...

I concur with my colleague Alexander Segal.