I just made a big IPA/APA during this MidWest blizzard last week. Since it was so cold out, I had to go back to my roots: my stove top! I boiled everything in 2 separate stock pots on my stove top. Each had about half of the wort. I just split my hops up and added them evenly when following my hop schedule. I've done it this way before and it works fine! This is what I suggest and then top off with bottled/clean/sanitized cold water at the end.
There are better ways perhaps, but do you have the resources? Either way you do it, as long as you clean/sanitize well, have lots of healthy yeast, and ferment in low 60s for ale yeast, you will have a nice citrusy American Ale!