Tax implications on repaying business investment money

[Clint Moore]

My question is what concerns do I have if I repay myself the money I invested in my S corp or can be LLC. My plan is to put money in my already established S corp or start LLC. Buy a home cash sell it to myself on contract, streamlining the BRRRR strategy, for cash out refi. My question is if I need the initial investment money back what tax implications or other issues might arise from repaying myself. The only reason I say LLC is because current biz is an S corp but not opposed to starting an LLC just to accomplish my goal easier.