The lack of USAF support is always a drawback: the buyer will have to pay for development and upgrades rather than piggybacking on the native operator.
Second, if a “cheap” option was available, it would eat into the more expensive programmes like the F-35 or Super Hornet and both manufacturers and the services won’t want that.
We can’t even afford the F-35, how do we expect India, the Philippines or Israel to?