Is taking approx 20 units too much to transfer out in 2 years?

Hi, I currently go to De Anza College and I want to transfer out in 2 years to San Diego State Univ. for Business Marketing. My ed plan says that if I take approx. 20 units in fall winter and spring quarters and I take 8 units one summer quarter then I’ll be eligible to transfer in 2018 with a AA in Business Management. Is taking 20 units a quarter too much? Or is overrated? I can spread out my classes and transfer in 3 years but if I can do it in 2 years, I’d rather do that. I want to know if it’s going to stressful or doable? Depending on the classes I take each quarter? Thank you

Taking 19 units right now and they are heavy on STEM classes, its not fun, I don’t recommend it, I am also trying to transfer in two years. Is it worth it? yes if you don’t mind putting your social life on the side for the next year or more.