i think shiho would find the apartment listing they eventually settle on and sort out the paperwork there and also be the grocery guy. as you said anon honami is probably at the helm for cooking but saki joins her on occasion (icchan likes her dish duty methinks. thanks for your hard work.) otherwise im sure theyd get a chore chart for most household duties but if one of thems too exhausted in the day, honami would always lend them a hand. sakichan likes being on laundry though because it means she gets a chance to pilfer everyone's clothing. #1 hoodie hoarder. im fond of the image of honashiho sitting down to do tax forms together.