What do you have to work with now? You just need a big pot, grain bag and a bucket. Some simple ingredients. A cooking thermometer. Heck, last week I brewed with cornflakes. Not just cornflakes(maybe 20%), also 2 row and some other stuff I had in the cabinet. Process is just as important as good ingredients and you can make really decent beer if you are lacking in one department or another. Personally, I can't afford to spend much money, but loving the hobby.
Brewing beer can be as simple or as complicated as you want to make it.