(Another) MOCA Question

We just bought a new house and decided to go with TWC and a Tivo Bolt/Mini setup using MoCA (supplied by the bolt). The house is a mess of old splitters and an amplifier next to the cable drop. The amplifier is needed unfortunately to get a passable cable signal in the bedroom.

We will be using MoCA adapters in the bedroom and downstairs office so we can use both a computer and the mini. We have a SB6141 modem.

The setup looks to be:
TWC Cable Drop --> One-Way Powered Amplifier-4-Way Splitter --> to 1,2,3
1-->Cable to Family Room (Bolt)
2-->Cable to Downstairs Office (hardwired Computer)
3-->Cable to multiple splitters to other bedrooms (Mini and hardwired Computer)

The question is: Where do I put the modem so that all my computers can talk to each other and so that each room has the ability to hook to a mini?

I think the fact that the amplifier is a one direction only is killing the MoCA. If I put the modem between the TWC Cable Drop and the Amplifier, I don't think the MoCA signal can cross backwards across the amp. MoCA also wouldn't be able to pass from the Downstairs Office through the Amp to the Bedroom?

If I put a splitter after the TWC cable drop and ran one leg to the modem and the other to the Amp, I'd have the same problem?

Would an Amp with a cable internet pass-through work, or what about diplexers around the amp?

Help!