People be funny. I do some classic car restorations on the side to help finance finance my car hobby.
I have a very nice MGB GT that I have been wanting to sell for a few years. 9K and its ready to drive home. Nobody wants it.
And yet, the same person who does not want to buy my GT for 9k will drop 30k to restore "His" rust bucket MGB GT.
My message to the OP would be "If you were going to go down the same road, then you might as well take advantage of the shortcut". Forget the money, the time savings alone can make it a good deal cause this car customizing stuff eats tons of time.
The challenge is to make sure that the work was not a hack job. If you don't know how to make that assessment, then go find someone that can. The wide-body FRS conversions that I have seen are hacked up bad enough in the quarter panel and front fender areas that an insurance claim to put back that much damage would total the car. I am not qualified to tell what it does to the structure.
Before you buy a modified car, make sure that your insurance company is good with the mods. Ask what happens if it gets in a fender bender where the wide-body needs to be addressed?
Destroyed front fender and bumper cover
Destroyed rear quarter and inner wheel-tub. and rear bumper cover.