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income source would be "Other."
I would get in touch with a CPA with international clients/experience. Will save you lots of headache in the long run, especially since you will be starting a new business here. You can explore a couple of options w/ your CPA including having your parents employ you through their Philippines company or for you to start a new US based company and have your parents buy shares in the new US company. Lots of options for you to get your allowance.
For now, just wait till that secured card graduates. Ask Chase if that Slate card can be product changed to another card in their line up (the Chase Preferred or Reserve for example). If it is possible, just take that approval for the Slate card. It will grow in limit if you use it properly. You can ask for a PC later on.
For lounge access, you be better off in paying for a year's membership from Priority Pass. After 1 year, I'm sure you'll be able get pretty much any card you want w/ your income and banking relationships (WF and Chase).



