As mentioned on another thread: "(Buying a lot of) books"; "Christian Book Distributors"
= "have sales often", "Amazon (online)" = "some under $12 or $8."
You may want to start by going to "the Half Price Book Store", each one has basic supplies,
and unique books from local resale stock. A well stocked study for your home could be done for around $550,
through thriftful spending. An endowed theological library can be arranged at about $1,200.
Whatever your decisions, start with two books in every pertinent subject matter of your study.
If you aren't sure, then use a public library, or a "Barns & Noble" to browse topics until your sure
of the course to take. If your really in uncharted waters, then just focus on one area.