I use my Ty as a DD. 90K. It does suck. But mainly on gas. Averages about 17mpg. And fix in about $2.15 a gallon. That means $38.00 fillups. Most I've gotten is 305 miles out of a tank. So do your calculations. Just a note....I drive my truck like a granny would. I'd say I see boost about every 3rd time I drive it. And its stock.
Despite how I drive it. Things still go up. In the past year alone I've replaced; O2 sensor, heater core, water pump, lower rad hose, upper rad hose, stat, radiator, and ABS unit took a dump. Luckily, I'm a mechanic and I can fix sh$t cheap. Oh, and lets not forget the most recent A/C venture. Lets just say without the help of my fellow Sy/Ty'er, and having some mechanical skill, I would have never sorted out that problem. A/C is nice and cold again

My truck was mint when I bought it and over the past 40,000 miles I've watched, and listened, to my Sweet, Tight, And Right Ty turn into a rattle trap. I'm constantly chasing noises and creaks.
My advice to you...If you're handy with a wrench, buy one that's not so perfect. Meaning, a nice high mileage STOCK example. Don't buy someone else's problem.
My advice to you if you're not handy with a wrench...buy a Honda.