Staying at Katherins and Franks house was one of my best accommodation in Australia. Peaceful neighbourhood, but just few steps to pubs, bars and restaurants. Also with perfect train connection to citycentre from Northcote station or easily reachable by tram. When arriving from the airport, use Uber ( price around 37$). I highly recommend this accommodation. Definitely my on my list for next visit of Melbourne. Thank you, Katherin and Frank :)
PS: what you might also appreciate is that Katherin will leave you some food in the fridge for your first evening and/or breakfast. Lovely :)