If your daughter gets past the "kick-start only" feature, FEAR NOT!
The 250's are as durable and reliable as the 650's in my experience (10,000 miles on a 2003 model).
Only slight changes over the years (e.g., oil capacity, etc.). No doohickey!
I have cycleracks on both my 250 and my 650; Cycleracks pannier set and top case; luggage interchanges seamlessly between bikes. Full adventure loading capacity on either bike.
Recommend Utah Sport Cycle bash plate (if off-roading is contemplated), ears protect water pump and plumbing. Tee mod essential (as with Generation 1 KLR650s) if serious water crossings are in your future. Tusk handguards, Ken Sean folding mirrors, and I consider my bike rather trail-survivable.
Checking out a used KLR250 isn't fundamentally different from any other model, AFAIK
; no known systemic vices.
A most under-rated dual-sport, IMHO.