1) Inquire about cost of maintenance
2) Inquire about cost of TKS (usually sold in 5 gallon containers?)
3) Inquire about FBO's that stock TKS (always call ahead)
4) Where are you going to store extra TKS in the aircraft
5) Inquire about how to clean TKS from aircraft interior (when I was a
dispatcher for NetJets, I had a pilot call in and report that the aft
baggage compartment was thoroughly deiced. The TKS container cap had not
been secured prior to flight, had tipped over and sloshed around the
compartment).