This is a question better suited for a lender, they will be more than happy to answer your questions. If you need help finding a lender to ask for help let me know and I will help you get a hold of one. Yo... more
That would depend on whether or not the foreign national is looking to purchase a primary home or investment property. Criteria for each or significantly difference and can/will vary from lender to lender.
If you're currently working with a realtor (and you should be) he/she should be able to recommend a local or locally licensed lender/broker to assist you further.