How does the receiving technology get built? Surely at least someone will have to go there the first time, and they will have to take the long way. It will still be quite a problem to get to a system 10k light years away.
The tricky thing is that hacking is usually an iterative process, and these iterations are going to be an extreme exercise in patience.
Actually, another tricky thing: how do you know that the other end is actually cooperating? If the aliens are dicks they could give you the thumbs up while having zero intention to reconstitute your consciousness. If you wanted to round-trip some brave soul as a means of verifying everything works, they could just send one of their own minds back instead, just for the fun of wreaking havoc.
No kidding! On the first try you accidentally end up causing a revolution because the targets/specimens ended up learning about the scientific method, gunpowder, and other dangerous things instead of just getting a proper advanced consciousness installed. So now all you can do is try to shape said species technological progress towards building the correct technology that you can hijack for your own purposes when ready.
"Just be patient"
I presume humans are the result of such a hack a few billion years ago.
Interstellar travel require patience, at least to get beyond the initial latency.
So we ship off these receivers to circumvent that limitation. Instead of travelling ourselves, we can send off our consciousness to inhabit a human-life analog to explore.
What that does to your psyche, and your body in limbo, are probably good material for a story, if it hasn't already been written.
At best, you'll throw a bunch of nanoprobes everywhere to get new entropy into the system.