In my opinion, with wine kits, you definitely get what you pay for. A kit has already had the pH balanced, the correct acids titrated, etc. Some of the better kits have winery grape skins included to provide fuller flavor and tannins. Some of the cheaper kits have more concentrated juice, but turn out ok.
In order to approximate a kit, you'd have to buy the grape juice in pails from a homebrew store, but then they wouldn't have the skins.
Unless you were buying the grapes, and crushing, testing acid, etc, you won't be able to approximate the wine you get from a kit.
That said, some of my best wines were NOT kit wines. Grape wines are tough to get right, unless you have a friend who is a vintner who owns a winery. But other "country" wines are easy, and great tasting. I love my crabapple wine, and my chokecherry wine.
Floor corkers just can't be beat. If you're only making a little wine, a double level hand corker will do, but it's hard to do more than about 3 gallons at a time with it. Sometimes LHBS rent out corkers, or loan them, so you might not have to buy one unless you decide you want to continue with winemaking.