Seconded. Wait until you have the money and transportation to make 2 or three lessons a week the reality. I think that number gives a fast enough rate, most retention and least review for the money. Also gives more options if the weather is bad on a planned lesson day. Use the bad weather day to study on your own or for some ground time with your instructor.

The students I had the most trouble with were the casual ones. Lots of time spent on review meant they often soloed at twice or even three times the average total time of my regulars. With every one of these students I'd suggest waiting until their schedule allowed for more regular lessons. They were only costing themselves a lot of money and time in the long run.