The best plan is to build 3 or 4 multi-functional probes now and just wait for the next interstellar rocks to come by and visit. No need to chase 3I/ATLAS.
The "next interstellar rock" could take hundreds of years to appear. The cost of maintaining those probes could be very large, and interest in maintaining them would probably disappear quickly, humans being the short-term entities that we are.
rzzzwilson|5 days ago
1970-01-01|5 days ago