FYI, from the 'rules' section:
We do not allow begging for free puppies or puppies at extreme reduced costs. Yorkies are generally from $500 on up, with most being in the $1000 to $1500 range. Please do not post looking for Yorkies below $500. If your budget for a Yorkie does not allow for $500 or more, you may want to look into Yorkie rescues or adoptions of older Yorkies, as they may be better suited to your price range. Feel free to PM sellers with an offer, but the public forum is not a place to beg or whine for a Yorkie.
There is some good advice in that. You may want to check in the rescue section here on YT--you may be able to find a Yorkie that is closer to the price you are looking for. Or you may be able to find a breeder who is trying to replace a dog that they have retired from their breeding program.
From what you describe, your funds seem limited and it seems that your time will be also once you start school. Why take on something as big a financial responsibility as a dog at this point? Why not wait until you are back on your feet and use the time between to conduct your search? That way you can take the time to find the dog you really want and will have the funds to pay for it and and other costs that come with it.