Congrats on having your retirement date within your 5 year plan window. As part of a hedge on future price increases, DW and I stocked up on APs before we retired in 2015. We have 4 - AP vouchers ready to use over the next 8 years. Since we know we are going anyway, the AP's are an investment growing at the rate of Disney's price increases. Our next planned AP year 2019 - 2020 [TSL / SWL] will work out to about $15 per park(s) day. We also were able to get 10 day No-Expire+ tickets which will fill in the off years and allow us to sun burn at the Water Parks up to 10 times. If you know you will be going to WDW and have the disposable $$, stocking up on AP's and or other tickets which don't expire would be my recommendation. Be aware though, Disney is slowing moving to have all new ticket purchases have some sort of expiration date. This strategy may not be available much longer.