can i submit a room and board affidavit, lease or contract with me i-134 as proof of income

As the K-1 is a nonimmigrant visa, you and your cosponsor can both submit I-134 affidavits of support. When your fiancé comes to the US and you marry within 90 days and file the application for your spouse's green card, you and your cosponsor can submit I-864 affidavits of support. You appear at this stage to be mixing apples and oranges as I-134's are for nonimmigrant cases and I-864's for those dealing with permanent immigration.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.