Hello Rhonda!
January is not a bad time to go. DW and I have made a Jan or Feb trip now 2 years in a row. We too, don't have a lot of money. Going then with the discounts offered can't be beat. To even save money we drive from NE Ohio. Last year non-stop.
We've had good weather. Only 1 day of rain in those 2 trips. The temps have been at the worst, high 50's for a daytime high and a couple of days where we wore shorts.
The parks will not be busy. On our 2003 trip we saw everything we wanted w/o using a FP once. We bought a 4 day pass but only used 3 days of it to see everything. Epcot was open later than the other 3 parks so we went to MK, AK and MGM all in the AM. Did all to see and do and each evening (or early afternoon) went to Epcot and had plenty of time there.
In 2002 we were at Epcot on Super Bowl Sunday. I have pictures from the WS in the afternoon with hardly anyone else happening to get in the photo. I remember watching the Canada movie with about 12 other people.
I've seen the photos of PC and read the reviews too, but don't discount the AS yet. DW and I loved ASSp. We like sports, so we chose that one. One time we stayed in the baseball area. Quiet-but far from FC and bus stops. Another time in the Surf's Up area. Our room was just around the corner from the main pool and the FC, but since on the "backside" of the building it was quiet.
You asked if the AS are clean. One thing about WDW, if you are not happy they will fix it so you are.