I would say its very unlikely all 4 are needed, and since its likely only 1 or 2 are bad, you have time to find a semi local reasonable mechanic and get them to have a look. My Focus has 3 mounts, and only 2 of those fail commonly.
A couple tests, put your car in P on a level surface, pop the hood and push it forward an back, if the engine moves too much with no resistance, its a torque mount. Next on a level surface, put the car in N and rev and hold it every 100rpm starting at say 1800rpm. If the interior of the car resonates at rpms in the normal hwy cruising rpm range, anywhere between 2000 to 3000rpm, one of the weight bearing mounts is shot.