if my husband moves out after filing I-485 for employer sponsored greencard - will I still be eligible as his wife if legally married but diff homes?

Yours is not a marriage based petition case, and as long as your husband continues to to support your immigration application, I would assume that you will obtain your permanent residence. I will also assume that the move is in the same immigration office jurisdiction as local field offices of USCIS may not wish to adjudicate applications of persons residing outside their jurisdiction. The fact that you already have two children nullifies any suspicion of a non-bona fide marriage. Separate addresses would appear to be more of a concern where a US citizen or permanent resident has married and is petitioning for the spouse, or where the principal in an employment base case has a recent marriage. Due to the limitations of the Lawyers.com Forums, Alan Lee, Esq.'s (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.