It sounds like you're on the right track! I also own properties in the Cleveland area and initially paid for them under my personal name before transferring them into my LLC. It was super simple to do, and as long as you're personally guaranteeing the loan, you should be fine.
Regarding your question, it's generally safer to pay the down payment from your personal account first, then transfer the deed to your LLC afterward. This way, you avoid triggering a "due on sale" clause. Just make sure you document everything properly, and once the property is in your LLC, it can operate as you described.
As for your concern about taxes, keeping it under an LLC is a smart move for liability protection and managing income. I used the same LLC for multiple properties and only changed it when I adjusted my strategy. Creating a new LLC for each property can be costly in Ohio, so consolidating can save you money and hassle. You've got this—just make sure you have everything set up correctly!