I think you'll find your chances very limited. Besides the 1911-series, which have readily available 22 LR conversion kits, there aren't a lot of others. The action mechanisms are just too different between the calibers. You might be better off looking for a "series", like getting a Beretta 87 in 22LR and then moving up to an identical gun in a Beretta 84/85 or all the way up to a Beretta 92. In these instances, the guns will be so similar that they will "feel" like you're shooting the same gun.So what i'm looking for is some semi-auto handguns in the 300-450$ range that i will be able to shoot at the range for years, and that i can up-convert to 9MM in the future. Watcha got?
Other "series" might include: Stoeger Luger in 22LR, and then 9mm; Ruger 22/45 and then any 1911-family; Walther TPH in 22LR and then PPK-family.