I knew guys back in the day who bought twins to get their ME time. You needed 300+ ME back then lol. Their intent was to sell the plane as soon as they were done.
Whether that works out, depends on luck to a large degree... if you can get out without any big MX bills, you're money ahead. My friends were pretty nervous while they owned the planes. These were also mil guys (helo) so they could afford to buy planes.
In today's climate, if you wanted to hang on to it and lease it for training purposes you'll probably come out ahead due to the ongoing demand. Unless maybe you end up with a real lemon, but thorough pre-purchase homework should mitigate that risk.