Undersatand that I am not in a position to tell you what to buy or who to buy it from. The info I'm offering is merely to help you narrow down your choices.
1. Receive-only satellite systems (TV) generally can be used underway, at anchor, pierside. That's because there's a little satellite about 22,300 miles up there beaming down coverage over a wide area. There's a lot of "slop" built in. But the reverse is not true. Two-way communications like telephone and internet require that you transmit a signal back TO the satellite. And at that distance, it's a pretty small target. When your satellite antenna isn't dead on, the connection is lost - in both directions.
2. Then there's a chance that a terrestrial solution (as opposed to satellite) might work better (and cheaper) for you
3. Because terrestrial solutions have a limited range. If you get too far away from the signal source, you'll have to wait until you get back within range to recover.
4. There are omni-directional portable satellite systems. But their speed is excruciatingly slow. It's ok for telephone, can't do TV, and data is slower than fax. Directional portable systems are faster, but aren't a viable ROTV solution. And because of what I described in #1 above, they required gyro inputs to run the auto-tracking. Gyro inputs are used by the antenna auto-track system to control servo motors that compensate for speed/direction/pitch/roll/et cetera. Simply put - and within reasonable mechanical limits - it keeps the antenna on the satellite. Effective, but not cheap.
5. Using either #4 solution, you'll still need an independent system for TV. On the better two-way satellite systems, you can phone via VoIP. That's a two-system solution. For less money, you'd could drop to a 3 system solution; satellite phone (omni), internet (auto-track), ROTV
6. So now you have an idea of how to split your $3k. It really boils down to a matter of speed (or lack of) over convenience.
Even though I'm a retired satellite professional, I'd still personally research the hell out of a terrestrial solution before sinking retirement funds into multiple satellite systems.
//greg//