My direction was more to show a possibility. Just demonstrating that $1000 can get you quite far for just sub(s) and an amp, not so much as a recommendation of a specific set up.
That being said, it is more up to you what you decide works best with your desires, space, and budget. Be it a single 12, dual 12's, single 15 etc. Whether to go ported or sealed enclosure etc. These are all personal preference.
I have run lots of different set ups over the years, and had many things I've enjoyed with each. Tuning in the 32 - 36 hz range should do quite well in a proper sized enclosure.
At the end of the day it's up to you.