Re: satelite question
First of all, there are 2 types of satelite. The one you see on many RVs is download only, for TV. It requires a different, bigger, dish and a different company to get internet service. You see these occasionally, but not nearly as often as the TV dishes.
I believe there are only 2 TV services and 2 Internet services, so the choices are moderately simple. Once you get the service, the simplest thing is to install a second dish and second receiver in your house, and have at it. If you are 'cheap' and have the time and inclination to mess with it, of course you can run a cable from the output of the dish on your RV or the output of the receiver to your house (assuming they are next to each other) and use the service in the house. Another option for the internet service is to have a wireless router in the RV, and a wireless hookup in the house.
Since you mentioned internet, I'm going to guess at the prices. They may have dropped since the last time I looked into it; perhaps someone who actually has the service can provide the current pricing.
For an automatic dish, I think you are looking at around $5000 - $7500 for a setup on the roof of your RV. For a manual dish you set up on the ground and aim yourself, its probably more like $250 - $500 for the hardware. I think the monthly charge will be in the $75 - $100 a month range.
Note that the speed will be better than dialup, but not as good as DSL/cable. You might also want to consider using a cell phone for internet. Most of the companies provide unlimited internet for about $60 a month, either through your phone or a separate 'air card' for your computer.