we have made advanced payment for material and other stuff. how should we approach about getting that money back from him?

Thanks in advance!

Thanks in advance for your time and answers to this question.

Thanks in advance.  

Thanks in advance!

Thanks in advance if so! 

The smartest way to use it if I do (perhaps using it to put money down and they paying myself back with a refinanced mortgage in the BRRRR method).I'm also curious if the old adage "it takes money to make money" could be applied here and what I should really consider before even touching that money.

In our partnership, I’m the methodical one, I do the books, run the backend like building and implementing the company SOPs. 

Thanks in advance!

Thanks in advance.