If you start with a new gun you won't need parts. The type of lever gun is a choice of what you want to shoot for a cartridge. If you want to shoot it on a regular basis then anything in a pistol cartridge. The also opens you up to adding a handgun it the same caliber. Also think 44 special/44 magnum or 38 special-357 magnum. This gives you a lot more options. I have shot Uberti lever guns for years and have had few if any, or major problems or had to replace parts. If you don't reload and don't intend to then it's how much you want to spend on ammo. Any rifle cartridge is going to cost way more per round. Think about shooting 100-200 rounds at the range with 38 special or 30-30 or 45-70. If you do reload then it's a lot cheaper to load 400 rounds of 38 special on a progressive press. How much shooting do you really want to do?
I have never owned a Henry anything and don't plan to. I have nothing against Henry, I just would rather have a reproduction of a Winchester 66', 73' or 92' than a Henry that is a copy of nothing. I also shoot original Winchesters and Marlins of the era. Reloading opens many doors and options.
You might want to look at a Rossi lever gun too. They are also very popular. My 2c