[Jump2xs]

Even if you get the car for free, I seriously doubt you can make much money, even if you do nearly all the labor. Figure you will find even more rust when you start getting into the bowels of the beast, especially on a known rusty car--heck I've found nasty rust on cars I thought were near virgins.
The market for an "A" engine is not terribly brisk, because most folks want the internal mechanicals of C/SC/912. Maybe You'll find someone who just needs a runner for a beater--$1000 might be optimistic.
You will then you'll need to find a buyer for your quickie resale restoration. Keep in mind that the T6-B coupe is not at the top of the 356 hit parade....more desirable than a T5-B, but barely.

If you want high adventure, and are able to keep the bride-to-be off your back while your on YOUR back, then explain to her why you need to spend 22k and hundreds of hours to make 2k, then go for it.

My advice is take a second job or work some overtime, because restoring a rusty coupe is filled with risk and probably doesn't make financial sense.