What makes you think it sounds possible? Unless you're one of a very small number of people in the world who actually work on this kind of thing, "sounds possible" doesn't mean a whole lot. I don't work on the spacecraft, but I do work on the rovers they carry. Based on my limited expertise as someone in an adjacent field, the ability to send any spacecraft to another star on human timescales is not currently possible in any sense whatsoever. The ability to send a "spacecraft" weighing tens of grams to our nearest neighbor might be possible within my lifetime. The ability to get a voyager-sized probe to another star within my lifetime is as far outside the realm of possibility as anything can be.