As far as vetting goes, it depends if you're talking about JV'ing with someone local or a stranger on internet.

But I'm no stranger in learning.And thank you so much for your offer, Matt.

But here is where common sense comes into play: why would any local who comes across such a rare jewel in Elkhart Indiana or Bryan Ohio hand it over to some newbie/stranger/douchebag from LA or NYC of SF? 

When my oldest was a toddler he used to tell strangers 'I want to buy your house today.' 

You aren’t going to talk a stranger into seller financing to you without a lot of trust.

Lock up a good chunk of money for years with essentially a stranger and pray that your sponsor does not appear on an episode of American Greed any time soon.  

I'm no stranger to big projects, so just because they'll cost a lot doesn't mean they are a headache to me.

Do you actually trust strangers to be responsible for your money.

We have a tenant-landlord relationship already, so we aren't strangers, but nor are we really familiar with one another. 

You were lucky enough to inherit $2.5 million because you came out of the right cloaca, and now you're asking strangers on Bigger Pockets for investment advice.