just tell customer how much would a builder charge etc , love gutter gutter cleans standerd 25 each side , tell them how much to replace , as for fascia sofit etc , i normaly say i dont realy know how long it will take , double up on normal window clean rate , tell em ist and add some on , its a dangerous job , thats why there not doing it , in past under quoted big mistake could of earnt more money doing windows not any more , make sure you have stand off , got about 4 jobs booked for the spring keep pushing them , also try to have someone with u footing etc , for cleaning fascia etc i use evans mstrole multi purpose cleaner small spray bottle pre spray ahead of yourself hope this helps