Single strand aluminum branch wiring went into houses across the country between roughly 1965 and 1973, and Marion County has its share. The problem is at the terminations rather than in the wire itself. Aluminum expands and contracts more than copper, oxidizes differently, and works itself loose at screw terminals over decades, which produces heat at the connection.
Full rewiring is one answer and it is expensive. The more common remediation is pigtailing every termination with a listed connector rated for the aluminum to copper transition, which means opening every device box in the house and doing the work at each one. That is labor-intensive and it is the part people underestimate.
Insurers ask about aluminum wiring, and some will not write a policy without documentation that remediation was done. Keep the paperwork.
Technician insight
Anti-oxidant paste and a wire nut is not remediation. The connector has to be listed for the transition, and inspectors know the difference on sight.