personally would not do this for same price,and really doubt id do it anyway at that frequency im same as you every 5 and 10 wks with a few on 6 wkly,had a custy last week wantng a quote and said dont mind if you can call every 3 months or even 6 months but not a chance put her on 10 wkly
i dont see the point of cleaning 3 times a year on normal stuff even if its well priced,they could move house months ago and you wouldnt even no.