I am not advocating engine swaps in GT. I was just expressing my opinions regarding the upgrade model in FM3 and GT. I know that GT has a tendency to go its own way disregarding what other games do and this does at least make the series unique.
I have no idea what the maximum size of the garage in GT5 is, but I have a tendency toward the Pokemon mentality when it comes to GT games... in that I have to get them all (I did that in FM3 and it took rather a long time and I did end up with duplicates along the way). In the situation where I have an irreversibly tuned car and need to buy a stock one also, I hope I do not reach a point where I have a few cars to buy and no space in the garage to put them. They have the money limit (already well discussed) at the maximum value of a car, so I would not put it past PD to have a limit on the garage (I hope it isn't at the Trophy point) as that would leave me a little "unimpressed". All down to the irreversible changes if the maximum size is the number of cars in game.
I have no idea what the maximum size of the garage in GT5 is, but I have a tendency toward the Pokemon mentality when it comes to GT games... in that I have to get them all (I did that in FM3 and it took rather a long time and I did end up with duplicates along the way). In the situation where I have an irreversibly tuned car and need to buy a stock one also, I hope I do not reach a point where I have a few cars to buy and no space in the garage to put them. They have the money limit (already well discussed) at the maximum value of a car, so I would not put it past PD to have a limit on the garage (I hope it isn't at the Trophy point) as that would leave me a little "unimpressed". All down to the irreversible changes if the maximum size is the number of cars in game.