Janet and her family are lovely friendly people. Regarding transport back into San Francisco you can get an Uber for around $28 in off peak times and we purchased 3 day MUNI pass in town for $22 and you can use the Muni Buses and cable cars as much as you want. To get back to Janets we caught the BART to Colma station and then the 122 bus which drops you off down the next block at the corner of Warwick and Gellert Sts.