Hey guys I need some ideas on my future situation with my mum and step-dad.

I'm wanting to buy a house with a yard and put a granny flat on it for my mum and step-dad.

Their current situation is they own a 2 bed unit and are receiving the pension each. They are 70 ish.

Should they:

Rent out the unit and live in the new granny flat and pay me rent?

Sell the unit and put money into their super and drawdown slowly?

Sell unit and buy the granny flat for themselves on my land? This one scares me because of inherentance down the track.

Any other option in not thinking of???

I guess the best outcome for me is where I own 100% of the land and grannyflat. And I guess the best outcome for them is where their pension isn't affected but they don't have to pay a lot of rent to me. Would they get rent assistance?

Thanks