So my father just retired at 55 and recently got 100k

[Chris Breezy]

Not being real estate, what’s his best move with this money. With his retirement he is comfortable to live but he’s trying to really use this to his advantage. He asked me and I didn’t have a great answer so I’m here.

initially I thought put it right in index funds that are low currently but then I thought maybe starting a Roth IRA for him or his wife who still works might be better since after 59 1/2 it will be tax fee. Thoughts , ideas will be appreciated

[Ben Scott]

What's your father's risk tolerance and desire to get in to real estate. Purchasing a rental would be a good investment but only really if your father is excited about it and sees the value. 

If he's looking for passive income from real estate, you could look at an REIT or investing in a syndication. Meet some folks at REI meet-ups, qualified and vetted investors, who need capital for large projects.