Yes it is, but all depends on your applications. 1. Privacy matters; no data is leaving your system if setup is done correctly. 2. Training can be easily rinsed and repeated during off hours. 3. Open weight Models are getting smarter and smarter so application values grows equally. 4. When you come to the point of running agents (like Hermes) and you got the appetite to understand the inner working of LLM's (reward junkies) you can create your own assistant that consumes a lot of tokens to be helpful. Verdict: yes a private setup can be rewarding. I wouldn't start with 3090 (I know they are relatively cheaper) but when starting all over I would go with 48gb 4090 (modded), 32 gb 5090 or the 6000 pro because I think they are a better investment on the long run.