dude, thats like a rear panel and at most 2 a couple of floor pans.... thats nothing, you should see what mk1 & mk2 escorts look like when you start repairing those, a good friend bought what looked to be a solid 72 mk1 escort, so far the replacment panels run in at, an
A pillar
2 inner wings
rear panel,
bulkhead,
heater bowl,
2 outer wings
front panel
front cross member
passenger footwell front and rear
passenger sill
rear lower quarters both sides
and a drivers door
weve only had it there 3 weeks and that set him back 3k for the car alone!!
to me this rust from these phots looks a touch like a mole hill, personally if it was mine i'd be cutting in new panels and welding them up, especially for an oak green 16v!!

and thats so far, and weve not finished