Questions about getting DECA installed

My current set up is a slimline 5 that goes into a Zinwell switch then 2 lines to a HR21 downstairs, 2 lines to a HR22 in one upstairs bedroom, and 2 lines to an R16 in another upstairs bedroom (this BR is on the opposite of the house). All coax is run on the outside of the house.

This is an old house built in 1920. The walls are full of fireblocks that make fishing wire almost impossible. The outside is steel (not aluminum) siding. When the electrical wiring was redone, they actually had to remove sheetrock in places to get the wiring run.

I can have MRV using my home network using WGA600Ns at the HR21 and HR22. I have been beta testing that and it works. I don't want to have to redo the walls to install cables.

My question is can the DECA install be done with all the cabling and switches on the outside of the house the way it is now?

 

Good to know, thanks guys.