That's a lot of money for a non-original car. It all comes down to what you want, and I feel like you have written a pretty good description, so it would mostly come down to personal taste.
I feel fgfs in general have had a pretty flat-line price trajectory in the past 5-7 years as far as value goes. In the mid to late '2000's, prices jumped quite a bit, then leveled off, if not dropped a bit after that. But there seems to be a definite uptick in value the past 6 months or so. Project cars have skyrocketed in price recently, similar to what you mentioned.
Personally, I do not like the color of that car. It looks like primer to me, but to each his own.
Getting these cars as close to stock original has always been my personal goal. Part of the 50+ year old car driving experience, is well, experiencing what it was like to drive them back then. Rattles, squeaks, hard suspension, driving down the road with your favorite AM station blaring, etc are all part of the 'smiles per gallon' experience.
I admire all the expertise it takes to cram a modern drive-train into an old car like that, but its not cheap, and takes a long time.
And it will always be questionable and doubtful that you would ever hope to recoup the $$ put in unless its a labor of love.
As far as questions about that particular car, you seem to have covered the important points.
As far as holding value, old cars (meaning typical, non super rare types) seem to flow with the overall National economy. Modified ones can be less, or more, depending on each person's taste. That is what makes modified cars hard to get under your thumb. I think original cars with original parts will always be worth more, but that is just my opinion. What appeals to each person likely varies greatly in a crowd.
Good luck with your search, if you are interested in something much more original in that price range, let me know.