I started playing just before the poe update. The build time wasn't of any concern to me to be honest, there is still so much to do in the game so there won't be much of a down time because of that. But what was more of a concern was slots, specificaly warframe slots.
I felt like I had to be carefull with what i chose to be my new warframe (and weapons also) because they would take up precious slots. You have to remember, I was new to the game and had no idea how much plat was worth since I new nothing about trading. How much is 20 plat? How do I get it, and how long will it take me to aq