We live in an apartment, we used Ferber, it worked for us. We warned the neighbors in advance. They were supportive. The amount of noise a kid makes at that age, pales to the amount of noise they are capable of when they are older.
If your schedule allows, and if your budget permits (but I would find room in the budget), use outside resources, a sitter, a grandma, a MDO program, and bank on your sleep. Nap during the day if necessary to get well rested, then do Ferber.
It will take 4-7 exhausting nights, but then the entire family will be better rested.
Also, I forget the name of the resource, but there is a book re: not so much how to sleep train, but when to sleep train. It identifies so called magic windows, between developmental milestones when kids are more amenable to sleep training. 8 months is a hard time, our boy would rouse, pull to standing, then get distressed because he couldn't figure out how to lay down again. Thankfully, we had sleep trained already, so once layed down, he went almost immediately back to sleep, and so did the rest of us.
Best,
F. B.