power adapters are ur friend here 
Ive been sceptic for quite some time to home plugs sice it's early days. But I gave it a go in our new house due to our position of the living room compared to the computer room where the PfSense box are.
So I tried a home plug solution for the HTPC and I must say I have not had a single problem and the speed is resonable, I have a 1000/1000Mb/s fiber connection and the htpc do not need more then 50-100Mb/s and that the home plugs I use deliver without problems.
I don't use wireless since it works so much better with cables but now I will use home plugs for less critical machines which saves a lot of cable management
So I will recommend haywire to try home plugs, they have matured a lot.
