If you're only planning on flying twice a month, then you're going to spend much of your time each lesson relearning what you forgot from the last lesson. It'll take you more total time to get your license, which means much more money in the end.
I know it's expensive, but try to find a way to fly much more often, maybe 2-3 times each week, at a minimum.
+1 to Champdriver's post. The total outlay of money will be less if you go at least 2x per week because you won't spend the first .3 hours "shaking the rust off" (believe me it happens after only a week or two of non-aviation) Also have the money set aside to finish...there are many people who started taking lessons but never finished because life* required the money be used elsewhere. (Many FBO's will give discounts if you purchase instruction and hours in blocks). Lastly, start ground school, then start flying a few weeks later. What you learn in the classroom will enhance what you learn in the air, and v-v. Neither a sim or stick time will be effective if you only "fly" occasionally.
*life = That annoying thing that happens while you were busy making other plans!