I did look into some of the residential courses, but didn't end up going with one in the end. I know my former boss did one in Wales a while ago with success.
Last October, I had a two week window during which I was hoping to get my license. What I did was call a local instructor a couple months ahead of time, and explained what I wanted to do. We blocked out 10 hours of lessons over the two weeks (2 hour lessons M, W, F) and I scheduled the test for the Friday at the end of the second week. I told him that I was willing to do whatever it took, so we agreed that after my first lesson we would assess where I was, and add in lessons if he thought it was necessary.
I ended up keeping the schedule of 10 hours, and managed to pass my test. I will say, however, that I did hours of extra practice every day with my husband. Basically I lived and breathed driving for 2 weeks.
I would try contacting some local instructors and seeing what they suggest, and what they can offer.