OP, your military client can get 3 different tickets.
* 4-day Armed Forces Salute. You can get 4 park days + park hopper, or 4 park days + water parks & more options, or a combo ticket with 4 park days, park hopper, and water parks & more. Not every base has each ticket choice, but they are available at Shades of Green in WDW. We find it time-consuming to go to SoG for tickets on our precious vacation days, so we get these tickets at a Disney Ticket Booth anywhere on property. Only thing is you pay 6.5% sales tax. You can't add days to them, but you can buy two for each person as long as you don't exceed each qualified military person's allowance of 6 tickets. They expire on Sept 27, 2014. We haven't heard about a follow-up program yet, perhaps in July or August we'll hear.
* Stars and Stripes ticket. Up to 10 park days on a ticket. They are length of stay tickets, meaning they expire a few days after first use. They seem pricey, but they include absolutely everything you could possibly have a ticket for in WDW.
* Regular Disney MYW tickets. These come in choices from 1-10 days. You can add park hopper. You can add water parks & more. You can add both options for quite a savings compared to adding the options individually. Not every base has every ticket, but they can be upgraded by WDW outlets (+tax). Shades of Green doesn't do upgrades. Shades of Green will have these tickets for sale, and you will save roughly the cost of the sales tax on these tickets. As previously stated, I don't want to take the time to go over to SoG but your client might feel otherwise.
Good info:
SoG AFS tickets:
http://www.shadesofgreen.org/ATT.htm
SoG Stars & Stripes tickets:
http://www.shadesofgreen.org/StarsStripes.htm
SoG MYW tickets:
http://www.shadesofgreen.org/WDW.htm