I think you can get a solo and a tandem for $2000, used, and some looking. I'm 230, 6-2, prioritize stability over speed, and love my SR Tranquility.  34 pounds or so. Hard to find used - I got very lucky from a outfitter changing from SR to Northstar. 

If you're not portaging the tandem or larger, aluminum with the grand kids makes sense and ought to find a used one well under $1000.

Check all the outfitters reqularily would be my advice. Most go in the fall but I see some left.