Hi and welcome to Permies.
If you can front it, you could always accept payment arrangements. I'd use a very high interest rate and definitely get legal help to set it up if you go that route.
Failing that, I'd look for private lenders and try to build relationships with them. Find out what works for them and ask for their opinion on what you want to do. Of
course, if your family or friends have
enough money to invest in other things, you may be able to interest them, but I'd be worried about risk.
Let us know if you find anything that works.