I did the same thing with my coupe-there were a number of front end issues. New control arms, a new center steering rod, and then I aligned it.
My home alignment system uses two bars, about 6 feet long that I set on jackstands at axle height, and then I string fishing line around the car. It's easier than using jackstands because I always know the front and rear distances are the same. I then have to walk around the car 5-6X, measuring the line distance from the stub axles. (I take the wheel center caps off) Once I get the same distances for the front wheels and the rear wheels by sliding the bar back and forth, I know I have a square around the car.
The only alignment you need done is front toe. No caster, camber or rear anything. Perhaps a shop will reduce their fees when they know that is all you need. Should take them 30 minutes.
On 911's, everything is adjustable....unless they're spending 3-4 hours, they're not doing it right! Your situation is definitely simpler.