The complexity for your transaction will not be based off your income, rather the tracking/documenting of the cash funds you are bringing into the country.
Be prepared to provide a good hr contact for your previous jobs overseas. The HR contact should be able to provide/complete a verification of employment and income history.
Be prepared to provide your lender transaction histories and account statements from where any cash funds used for down payment or closing costs would be coming from.
Feel free to connect directly if you need any further clarifications. We are licensed in 50 states.