You have a number of options to consider when moving to the Washington, D.C. area. As with anything, a lot of this comes down to personal preference so you may wish to ask for housing recommendations on the welcome committee's WhatsApp Group.
Many students opt for the PCS Lodging Program. There are also several corporate housing companies that offer short-term lodging. Some cater to families, others to singles and couples. One great thing about this program is that it doesn’t have a sliding lodging rate like the other housing options do. Please see this handout on short-term housing and contact PCS Lodging Program via email for additional details PCSLodgingProgram@state.gov.
Others may want to consider a hotel before scoping out longer term options. Be aware that you will receive 100% lodging per diem for the first 60 days, but that amount drops to 50% for the next 60 days, and then to 25% for the rest of your training. Hence, if you have a longer training course you might be out of pocket. As with the rest of your per diem, you will receive 75% for family members on your orders who are over 12 years of age, and 50% for those younger than 12 years of age. Also, this amount drops just like your per diem after 60 days, and then again after the next 60 days. You can find a list of hotels near NFATC here.
Finally, there are a number of furnished places that people could consider renting, or students might even consider buying in the area in anticipation of coming back again. Be advised that if you buy a place, you will not receive the lodging per diem portion – just the Meals and Incidental Expenses (M&IE).
In order to be reimbursed for your lodging upon arrival in Washington, D.C., you must arrive on the day before your in-processing. If you arrive prior to Sunday, the additional nights of lodging and M&IE will not be reimbursed.