"plantar fasciitis"= sciatic irritation= lumbar pain =L5S1 protective behaviour leading to referred events in a sciatic distribution=limping=further lumbar hypomobility=exasperation=visit you.
Thoroughly mobilise L5S1 till normal tone and a non protected state of mobility is restored there . May need a stetch to his sciatic nerve. When you say the term "plantar fasciitis", think , referred pain. Ditto for hallux pain , certainly with what you have described in this case.