#2 .. No point. Just pay as you go
#3 .. it is kind of a lease takeover selling point, if you have it .. but not critical.
#4 .. if you have no intention to complete the 4 yrs lease, then there is no point to pay all the fees up front (ie. due on delivery) such that when you roll all the fees into the monthly lease, you are paying those fees as you go ... meaning, the eventual owner will be paying the leftover portion of those fees when he/she takes over. However, do note that for your lease takeover offer, you may have to give a fair amount of incentive to attract potential interested party.