I had to really defy my typical logic in purchasing cars in order to get myself to 21.5K on my 2015 ST3 with light mods (this was in early 2017). I justified it that I needed 4 door daily driver but something decently sporty with good aftermarket I'm not that old yet and the interior, accessories/entertainment, and mileage/build quality were leagues beyond any car I've ever purchased before (my brain was reminding me I could get a low miles, 2.3 TVS, bolt on, aftermarket wheels and goodies 03-04 Cobra and literally stomp the **** out of every car on this forum or a C5 Z06, etc. etc. etc.).
I honestly don't know how guys mentally get to high 30s, sometimes low 40s out the door on a FORD FOCUS. I sat in an ST, it's the same exact **** as my ST3 (obviously huge difference in powertrain, but 95% of your interaction is with the interior, seating, navigation, etc.). $40K buys a HELL of a performance vehicle, new or used. Not to mention you're going to get hammered on insurance for the tuner car. If it makes the owners happy, more power to them, they are the ones writing the check not me, I just don't get it. I got to Stage 3 and dyno tune this year, I'm going to try and do the last of the possible bolt ons little **** like throttle body, intake manifold, WMI, maybe hybrid turbo and add LSD next year. If I find I've just hit the wall with the car and where I want it to be, I may entertain stopping spending money on this and waiting for super low mile used RS pricing to fall...it will, always does. I'm not a big fan of BT builds, done enough in my day just not for me. To me, if I'm doing a built motor and bigger power adder than stock it probably means I need a better starting point (new car).