Well...
If you really want to do porn, here's how.
First you need to contact a major distributor and see if they are accepting any outside product. Most likely, the big companies like Vivid won't, but since I'm not an expert in this area, I don't see why you shouldn’t try to at least send them a email.
If they are, and they like what you have made, they will make a flat offer for your product. Since you won't have any stars or real production values for your first effort, they will lowball you. You should probably expect somewhere around $3 to $5k for your first effort. As you developed contacts in the industry, that price will rise overtime. From what I know about independent video, It can go as high as 20K for a film.
Now, if you have a quality product, you can expect more, but that involves not only getting super hot girls but technical people who know what they are doing. Really hot girls usually ask from $2 to $10k a day with a per diem. This doesn’t include such things as makeup artists, personal assistants, PA's, and trailers. For your actually shooting crew, you need 5 people for a nice looking production, but you can get away with 2 if you know the right people. A good videographer with equipment will ask for about $500 to $2500 a day. You may have to rent some equipment but most likely not .
After actual production, comes post. This should actually be easy, since their really isn’t much editing on a typical porn. Video editing should probably be $35 to $150 an hour. You will probably need only 6 total. Then their is the cost of dumping your original tape to D2. Some distributor will cover this for you, but not all.
Now there are plenty of ways of getting around these costs, mainly finding a videographer who already has video editing suite ( and is willing to porn). He will probably take a flat payment somewhere under $5k to do all the technical stuff for you. How much under depends on the quality.
In my opinion, a cheap porn could probably be made for about $7k first starting out. Now one session can probably make like 3 movies, so if you are able to sell all three at $4k, you should be able to make a little bit of cash. That cost will probably come down as you make more. There are ways to make them for even less, but that usually involves a little creativity.
The great thing about Porn is that there is always a market for it and that they are relatively easy and quick to make. Total turnaround time for everything should be no more than two weeks, That is for thinking up the idea, getting the people to gether, shooting it, editing it, and then selling it. The problem is
it really isn’t a whole lot of money on the production side unless you get to move up to the bigger films. The big $$$ is made in the distribution end. Also I am told that unusual porn film s sell much better than regular. So stuff involving Dwarfs and old ladies will make you cash. Whether or not you want to be involved in that is up to you