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Invest the 10k in a small retail business and live on the profit, by the end of the year you can have double of the amount as a bonus on top of your 100 million dollars.

Buy a tent and head for the hills or commit a crime that will get you 1 year in prison.

Do we assume we can't make any more money through any means?

If so, I would move to a small/medium town (somewhere subtropical i.e. deep south) and live in the woods/on the streets/couch surf etc. Spend < $25 on food/day. Bam. $1,000,000

4 starters, quit spending on things like movies, sports, & concerts. End subscriptions. Put hobbies on hold. Switch 2 lesser plans 4 mobile. Reduce transportation costs. Reconsider meals.

The fly in the ointment will be "health" insurance.