Yeah, considerations, off the top of my head, would seem to be:
- antenna to DVR signal strength -- This will probably be your biggest hurdle. As you note, you'll want the best possible signal getting from the antenna to the DVR, so you'll probably want to start with a direct coax run from the antenna to the DVR to evaluate reception, then adjust accordingly, adding an amplifier (pre-amp) as needed.
Just throwing the antenna signal into a big splitter feeding all your coax runs won't be uber healthy for signal strength; however, you could use an antenna/satellite diplexer at the splitter location to piggyback the antenna signal onto just the coax run heading to the BOLT location. (more info here)
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- ISP to cable modem signal strength -- similar to the antenna, you'll want to ensure a solid signal reaches the modem, either by using a top-level 2-way splitter to divert the ISP signal to the modem or using a dedicated line, the latter being preferred but possibly precluded by MoCA requirements.
- DOCSIS 3.1 and MoCA overlap -- The advent of DOCSIS 3.1, with its overlapping into MoCA frequencies, introduces a few new wrinkles in a MoCA setup: some modems/gateways that are sensitive to MoCA signals; providers beginning to actually use DOCSIS 3.1 frequencies above 1002 MHz, stepping into the MoCA frequency range.
Where possible, a dedicated coax run for the modem isolated from the rest of the coax plant (where MoCA signals are present) is ideal, but, of course, isn't always possible. Just keep in mind that any available Ethernet connectivity from the router location to another location with available coax is just as good as two separate coax runs to the modem/router location; the main bridging MoCA adapter just needs to be connected to the router LAN and to the shared coax plant; it's not required that the main bridging MoCA adapter be installed *at* the modem/router location.
If a dedicated coax run for the modem isn't possible, but DOCSIS 3.1 overlap remains a concern, workarounds include installing a MoCA filter on the modem/gateway to protect it from MoCA signals, or manually setting the MoCA network's operational frequency above the DOCSIS 3.1 frequency range. (more info here)
- expectations/requirements for MoCA network -- If you're looking for MoCA to substitute for absent Ethernet throughout the house, you may want to consider relegating your TiVo boxes to Ethernet clients, and allowing MoCA 2.5 adapters to have full access to the MoCA Extended Band D. Alternatively, you could configure two separate MoCA networks, allowing parallel operation, at the expense of overall throughput for the MoCA 2.0/2.5 network operating in the upper frequency range. Or just let all the devices interoperate as a single MoCA network, negotiating whatever peer links are needed.
- available coax runs and connectivity -- Absent new coax runs, you'll have to work with what you have, so knowing what's available would drive/limit the planning. The possibilities are *many*, including but not remotely limited to the following:
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