Well, for lab scale and for larger scale, you need a good method of coating that is inexpensive and reliable. Jim Browning's method is slow but reliable and usable. It is not inexpensive. It will make good film sheets up to 30x40 inches on film or paper. I have done it personally at Jim's under his tutelage.
For lab scale and larger, you need a good method to make emulsions and to do that you need a good mixer (not a good stirrer - unless you are working at very small scale) and you need reliable temperature control from about 40 - 80 degrees C. In addition, you need a lab full of chemicals suited to your destination emulsion and you need a refrigerator to keep your emulsions cold. You need a good washing method for the emulsion, including noodle wash, ISO wash and UF wash. These are all in posts here with pictures.
And, you need good support such as glass plates, subbed film, and a suitable paper. I have been using Strathmore papers, hot press at 100# or higher or baryta paper. The baryta is no longer available from the Formulary and IDK what the plans are for the future.
That summarizes things for starters. All of these are described in long threads here on APUG.
PE