I buy most of my stuff through silkscreeningsupplies.com I get my screens through melray.com and buy my garments through sanmar.com
On short runs, 1-12, I use 1 coat of diazo, on screens I plan to save, I coat the front and the back. 1 gallon goes a long way.
I use yellow dark room lights, so my room is pretty lit up.
I use black lights in my table, 5 to be exact and burn single coats for 8min and double for 15min.
Make sure whatever light you use, that the screen is 100% flat on the table and covered with a dull black towel or something before you apply whatever weight you will use to keep it flat or it will not wash out in spots. I learned the hard way.
Check out youtube for free demos
Office supply stores sell iron-on material that you can print in your inkjet printer. After the ink dries, you place it on a shirt and press it on with an iron according to the directions.
They don't last forever but it's cheap, fast and easy.