It's still used as a rental and my LLC is a single member.

The best option for you depends on a number of factors including your exit strategy, any liability concerns and preferred tax treatment.Type of EntityTax TreatmentMain AdvantagesC-CorporationDouble TaxationCorporate tax rates are lowerS-CorporationPass-throughSelf-employment tax savingsLimited Liability Company (LLC)Pass-throughLiability protection and flexibilityFuture Outlook and Recent Tax Law ChangesMost recent tax changes applicable to real estate investors include:The increase in the estate tax exemption to $13.61 million per individual for 2024.

This all went through an attorney who set up the LLC.

Hello,I wanted to know if I have a below poor credit score would it be beneficial to first try to fix my credit or create an LLC and build my business credit to start investing in real estate and worry about my personal credit score later?

Issue the loan to the borrower's entity (LLC).Either be available to receive a call or return the call as swiftly as possible when the borrower comes calling.Allow the borrower to have multiple open loans simultaneously (if all parties are comfortable with it) to help the borrower grow their business.Have loan products that help the borrower to expand their investing options in relation to ground-up construction and/or multifamily.Have staff that are knowledgeable to investing that can assist and understand the borrower's concerns or requests.Just a few that come to mind. 

Did you create an LLC for the purposes of operations and management, i.e. book keeping, income/expenses, etc.?

., not requiring a long-term lease for the “rent” portion of BRRRR before approving the refinance) or allowing investors to borrow in an LLC or other creative structures.

If he operate as an LLC, can he also save taxes and achieve 0 tax?

You won't have an issue provided you register the WY LLC in FL.

If a cash out refinance, many lenders will allow the cash out to satisfy the reserves requirement.DSCR lenders generally let you vest either individually or as an LLC.