I can remember when I could get 1k of 380 ammo for close to a hundred bucks.
There was an old Kel Tec forum that's been defunct for several years, where I read about 10K or more rounds being shot through a P3AT.
Here's a primer on Point shooting.
Point shooting can be practiced with other pistols that shoot cheaper ammo, like 22's, especially if you're just beginning to learn.
Once you get proficient at it, you can then use a couple hundred rounds to perfect your P3AT ability. That shouldn't break the bank at about 75 bucks or so. I find my Kahrs are also natural point shooters, especially the 9mm Kahrs (I have two). There are many other pistols that point shoot very well like my Taurus Mil Pro PT145.
Of course as range increases you go for a more traditional sight picture as the referenced article states.