I have purchased a small 2br unit (mainly for investment)
but I am moving in until the end of this financial year, while I'm there I am planning to renovate the kitchen and bathroom before I put it onto the rental market.
a friend of mine has offered to rent out one of the other rooms while I do that, I understand if I claim this income I would technically be renting out 50% of my unit, so I would claim 50% of the interest on my loan back, but can I claim 50% of the renovations?
I don't know enough about this topic to give you any 'real'/official advice, but you seem to be asking how best to negative gear this asset over the next 6 months/while renovating it? If so I'd advise you to seek advice from a professional on how best to negative gear it; it would be money well-spent. Is there any chance you could not erm 'officially' live there yourself while renovating it? I mean, given that you would be doing renovations all the while, it could be a grey area re sleeping over sometimes while renovating, and actually living there full-time. I mention this because it may be better financially/ tax-wise for you if are not officially living there, for various reasons. Maybe consult the expert about this aspect of things, if it is something you'd be interested in considering.
Good luck with everything, and be prepared for quite a steep learning-curve (and quite a few initial failures!) re the renovations, unless you are quite experienced. That said, even if it ends up costing more than expected don't despair; the skills you will acquire along the way will be valuable in the future. Also, 'renovate to rent'… by that, I mean put in stuff that is relatively cheap but hardy/durable, and stuff that is low maintenance (assume that the tenants will not 'look after' anything as diligently as you would yourself).