Perhaps you should re-evaluate the process. For example, I'm pretty sure you could buy a car in very good shape and salvage the chrome pieces off, pull the trim yourself, and get it to a reasonable painter, rather than paying over $10K
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for the cosmetic work. Or, go bumperless, and buy specific new trim pieces, buy a soda-blasting setup to strip the paint yourself, and still come out far less than your figure. Look at some of the DIY restoration work done by others easily on this site.
Where are you coming up with over $1000 for "tail lights and circuit boards?" There has to be a better, cheaper way that will work just fine.
I guess there is a decision to be made in there somewhere: what is your reason for having the car? Is it to get the work done by others and get it looking good and on the road, and cost be damned? Are you looking to get into restoration, and this car is a first step to learn on?
There really is no way to justify the time and cost of restoring a Spider from a "good business sense/sound value" point of view. That's the bottom line you have to find your peace with, and make decisions accordingly.
The cars are fun and relatively easy to work on. The scale is small: four cylinders; not much body surface; a very standard and simple fuel injection system, well-documented; available replacement parts for almost everything. I can't really see the interest in having all the work done by others, and the cost for that would certainly scare me, too. But as I said, you have to find your comfort level on the sliding scale that is old Fiat restoration.
I haven't looked, but have you posted photos of the car here? I'll bet if you post them in the context of asking for guidance from members here, you will get some very good advice, even if it may not be exactly what you want to hear.