Just to add to what Denise said, the complexity of the emulsion process at a basic level is about the same as baking a cake from scratch. (raw ingredients vs a "box cake") Now that level of effort isn't going to get you "Tri-X from your basement," but it will get you something quite usable. After that, it is how much do you want to experiment or try to invent so it's up to you.
Also 50 or 100 grams of silver nitrate goes quite a long way. My last batch of TLF2 has given 7 120 rolls plus extra used for testing, single frames, etc,. for 6 grams AgNO3. Total materials involved in that batch probably cost under $10 (US).
P.S. the term "proof" in regards to liquor gives the alcohol content. It is double the actual percentage of alcohol. So 100 proof is 50% alcohol.
P.P.S Thanks for the word on Chemsavers. Have bought from them through eBay but did not know they had a web site. Watch them for AgNO3. Occasionally they have a sale on it.