You have a conundrum. In many places, the plumber is legally responsible for installing the drain and ensuring things are waterproof, but he will often not do any tile work. The tile guy (unless he has a plumbing license, too) is often not legally able to deal with the waterproofing of the pan and install the drain.
The hassle comes in that to meet code (although it is not enforced reliably) and function well, the liner needs to be installed on a sloped surface, and if you build a 'conventional' shower, that requires the tile guy to put in what is called a pre-sloped mudbed. Then, and only then, can the drain and liner be installed. The plumber has to come in and do some prep work, then the tile guy does some prep work, then the plumber has to come back to finish his part, then the tile guy...as you can see, this can be a scheduling nightmare and few actually follow it to the letter.
It gets a little easier if you choose to use a surface waterproofing system. Often with those, you can install the drain and then build the sloped bed around it. THen, the waterproofing is installed. SOme inspectors don't really car who lays the waterproofing as long as a flood test is done, but that can't be done until the waterproofing and the drain are installed.
Some tile guys get away with doing the plumbing, too, but it really depends on the local inspectors, maybe a union if you happen to be in an area with unions who does what.
But, your first decision is to decide on the method of shower construction you prefer: conventional with a liner and clamping drain, or a surface applied bonded membrane, and if the later, do you want to use a sheet waterproofing material, or a liquid applied one. My preference is a sheet membrane.
Each of these methods can work, but each of them must be done carefully by someone who knows what they are doing and can follow instructions and the industry guidelines. There are a huge number of people out there that ignore some fundamentals, like you can't put a hole in the liner to nail on cbu on the curb, or attach it with nails below the flood plane and that you really do need to seal the seams properly. Lots of people can make it look good, but it may be falling apart in months, but maybe take several years before you can tell.
A properly built shower should last until you decide you want a change, not be changed because it failed. Built right, it should be there forever.
Look at Noble, Schluter, Laticrete, Mapei for their approach to building a shower. If you want to get technical, buy a license for the electronic copy of the TCNA handbook (or buy a hardcopy) and research the accepted industry shower build techniques, decide on a method, then research the products needed to make it that way. The TCNA does not endorse products, only methods. That's Tile Council of North America, the group that sets many of the standards on how to make things with tile. They, along with ANSI, perform testing and set standards for the materials needed to do not only tile, but other building trade practices.
For one method,
www.schluter.com has a bunch of videos on how to build a shower using Kerdi - one of many products out there. If nothing else, it will give you an idea of the methodology and logic for using this type of shower build. Feel free to look at the other company's products and their variations on that theme.