If you live in a developed nation, this thread probably isn't for you.
I can lend coughgamblecough around $1000 USD in whichever crypto you want. XMR for those more illicit businesses, I'd assume. ETH for those code businesses, and BTC for good ol' institutions.
What's your actual business plan? When will I see my money back? How are you solving local problem?
What's the guarantee if the business plan shared you wouldn't use it for your advantage? Will you be ready to sign a contract or some sort of legal stuff that will guarantee you wouldn't steal it? 1000 USD is comparatively a smaller amount for any legitimate business.
I have to agree with you. $1k is small capital for starting a business and probably wouldnt allow room to grow, and if OP is seeking business shares in whatever business he decides to invest in, that could pose issues with growth and expansion, especially if there is some type of loophole an agreement. On top of that, asking for a business plan, etc., is usually common in some investors before investing but thats usually is best to provide in person than to someone over the internet who could try to execute the business plan with little to no repercussion (since its not easy to track someone online).