hello, I studied fx makeup back when I was in high school and know some about wigs.
One of the things I learned when I was buying wigs was that just because it's cheap doesn't mean its looks bad, I have bought good looking wig for as little as $24
depending on where your balding there are different options, if your are balding on the top of your head or at the crown you can get what is called a topper, if your hair line is receding you can get a hair line wig. if you can i would try these first, they are much more comfortable than a full wig.
if you need a full wig i would suggest shaving any remaining hair off (i personally find it less itchy and essayer to keep on). I like lace top/front wigs made with Japanese Kanekalon Fiber or human hair. adjustable wigs are nice but any wig can be altered to fit with basic sewing skills. when i get a wig i get the hair thinned (or remove lace), many manufactures put a lot of hair on the wig and it can look too full to be natural. also wig tape can be a life saver.
Suggest buying multiple cheap wigs until you find what you like, ebay is a good place to start looking.