It took me a year to get hired from application to the start of training.
I got the "we're interested" reply after eight months but couldn't get a training class date for my desired base. A month before a year had passed I followed up and said I could go to any base. Afterwards I was finally given a class date.
In-demand bases at the moment appear to be DEN, BWI and possibly PHX. I recommend prospective applicants, who are tired of waiting, tell Boutique that they are willing to work at any of those bases.