Take the $7 million.
Use half to put in several startups that don’t need insane capital (including your down)
With $3.5 million left, take $1 million a buy as much bricks you can get with that. Break those down and front that work to whoever is willing to get their hands dirty.
With $2.5 million left buy as much cheap farmland in NowehereVille USA. Get $1 million in land. Build up a crib on it and use the rest as a crypto mining farm, solar farm and an actual agricultural farm — and immediately make $ from it. Lots of money.
Hire some illegal immigrants and they (and their families) can live on the land. You’ll need people to work and let them know to play their position because ICE is a phone call away.
With $1.5 million left use $500k to sprinkle in various institutions like getting museum memberships and finding ways to infiltrate social circles you aren’t normally used to being part of. You’ll get to be around people with real $ and they will assume you have $ too.
Keep $500k in cash on hand of the last million because you never know.
Use the last $500k for guns, ammo, body armor, bioweapons