Renting rooms in a house

Hi everyoneI was wondering whether you can give me some advice on the following situation. We have recently acquired a large house on semi rural land. We are keen on renting out part of the house in order to be able to claim some of the costs and use the financial burden – interest, stamp duty etc.The owner who we are buying from is going through divorce proceedings and would like to rent a few rooms of the house for 6 months.What we would like to do is move into it ourselves and rent some of the rooms – say we rent 2 out of 4 bedrooms, 2 living areas and 1 garage. As we will be living in the house, all utilities will be transferred under our name but the tenant has agreed to pay 50% council/electricity and water rates.As we have a couple of other rental properties, we would be keen on managing the property ourselves – especially since we would be living in it. So would draw up a rental agreement stating what they will be using and the agreement for utilities. Regarding payment of rent, the rent they could pay is ½ of what renting the whole home would be i.e. around $400 instead of $800. How did this all sit legally and would there be any issues with the tax department?Rather than transferring funds via the bank, could they pay us in cash and us provide them with a receipt which we both sign and use that as a record of payment?? Would this be OK?Also, when they do ultimately move out, could we do the same process and rent the property out to a family member – cousin?, with the same documentation or is this dodgy??Regards Grace