Oh man, the SGIs are so expensive nowadays. I always thought it would be awesome to replicate Nedry's setup from Jurassic Park but it would be like $10k in retro gear right now.
The MacBook and Amiga are pretty attainable goals still. Those early MacBooks were really hot stuff when they came out.
Why would you ever consider reporting him? The last thing someone struggling to live needs is to be harassed by the community and abused by cops.
Consider treating him like a human being. Ask how he's doing. See if he needs anything. Keep an eye on local social media for people mentioning him so you can warn him before some nimby bootlicker calls the cops on him.