But I believe depending on the entity type it has to either satisfy the entity financial pre-reqs or each member of the company has to be accredited.

This is a good thread on raising capital with some embedded links to other resources.https://www.biggerpockets.com/forums/432/topics/577174-raising-capital-from-accredited-investors

Are there any limits to the amount of private money that may be loaned from (or to) a non-accredited investor?

If you're an accredited investor you might consider investment into DSTs.

Not sure if anyone else has struggled like I have with getting BBB accreditation for their house flipping business.

Typically a syndicator cannot structure  a deal like they could with a regular accredited investor that is not a 1031.I have not done a DST.

That makes it sound like you are NOT buying this to own directly but are investing in a syndicate or a fund.Are you an accredited investor or is the investment offering open to non-accredited investors as well?

(might need to be an accredited investor)5- lend the money out hard money at like 2 points 12% interest. 6- use it to pay down high interest debt7- put in stock market... who knows what will happen8- keep it in your bank account9- go buy a Tesla or a boat with it. 10- give it to a financial advisor to invest it into some well diversified mutual funds. 11- invest it into a Ponzi scheme /pyramid scheme.

Are you an accredited investor?

Accreditation RevocationOn 08/09/2018 this business's accreditation in the BBB was revoked by the BBB's Board of Directors due to its failure to adhere to the BBB requirement that Accredited Businesses meet and abide by the following standards:6.