.8k Spindle, holder, vfd combo assistance

So, I'm in the market to buy 2, and then a 3rd set later on for use on 3 different machines in my garage. What's the best combo for 110v coming in, and what kind of warranty do you have on these?

Also, on the 800, it says 'light' CNC work.. does that mean these are not made to handle aluminum or hard woods?

Lastly, what kind of warranty do you have on them?

Thanks for answering my questions

~Doc