the "other side" of the house...... some tiny drywalls or reinforced concrete loadcarrying walls are totally different.
Do not forget, the further away you are from your own wifi point, the closer you get to your neighbour's.
Your situation might be more about your neighbours wifi than your own. Start with choosing a wifi channel that has no or little interference with the wifi points around you.
the labor cost if wireing your house is 10x the cost of the cable. Saving 20% in cablecost has a minimal effect on the total cost. CCA is only attrative if you have a fixed price project and have no concern about the drawbacks of CCA.