LMAO - Eliot Spitzer paid FAR MORE (per mile) for his self-indulgent (and illegal) ride(s) than what you're working on. There's no comparison between the two.

I'm 47, busted my stones all of my working life too, and have just two of six kids (between my wife and my previous marriages) left in the house. I feel your "pain", Bud. You deserve whatever opportunities God has provided you with the means for.
I honestly think the SRT's will be the collectors' items of the future. You don't have to buy it with that intent, but knowing you have it should bring you more satisfaction than wishing you made a different choice.
If you can afford it, get it. Don't second guess yourself........that's your wife's job.