Sounds to me like you are either building or remodeling a new home. Most installers wont do an install in 2 parts.
Want to make things great, here are my recommendations:
-Pre-wire your entire home with RG6. I am a fan of pure copper cable.
-Network your entire home with CAT6 cable. At least one location to ea rm, including kitchen
-Run all of your cables to a central location, as known as a home run. Do not install any splitters. Point a (outlet) to point b (home run location / straight shot)
-I would put everything on the south end of the home. Make this easily accessible and by accessible
not in a spot that one hand can fit into. Also in this location make a grounding source. (breaker box, braid, cold water pipe, or an easy access within 10' to the outside where a rod could be placed...) Most homes that are prewired like this have cables ran to the breaker box location or a central closet of some sort.
-Do not worry about wall plates until after the installer is there. Once he/she leaves then add blanks or cheap wall plates
-Leave plenty in the box and at point B for terminal for service loops, etc.
-Do not waste your time putting terminals on anything
-At the point B location, have a piece of plywood or someplace for the diplexers/ground block, etc. to be attached to. At least a 2'x2' section
-If you are going to hang TV's, have chases in the walls for cables. Long HDMI cables can be had. Shop around and you can find them cheap. We have a place here that will custom make HDMI cables. Know that a rcvr is highly likely to be in the same location as a TV.
-Know that cables will be coming from the outside of the home (dish) to the inside. If I were to build a new home, there would be a 1.5" piece of conduit from the outside (a down turned elbow) to the inside where I could later fill the conduit with insulation
-Plan ahead. If there is any thought of an audio system, wire it. Now is the time.
I could probably go on. I wish I were in your shoes. If you want to purchase cables and installer tools, techtoolsupply.com is a good source. You can buy your RG6 and CAT6 from them also.
Here is some great reading
DigitalTips: DIY Options in Home Control
CEA: TechHome Rating System
BTW, I hope I didn't waste my time by writing this up. I also agree that self installs of satellite systems is super over rated and find it rather amusing that people insist on doing it themselves. Pre-wiring a home, prepping it and so forth is far different that installing a system. Pre-wire the home and stop there.