Hi Nick,
Both options you've listed have their pros and cons, but most d experienced real estate investors would likely recommend the second option for the sake of clear record-keeping and easier tax preparation.
Keeping a separate bank account for your rental income and expenses can greatly simplify your financial tracking and reporting. This includes not just rent collection and mortgage payments, but also expenses related to maintenance, repairs, insurance, and any other costs related to your rental property.
While it might seem more cumbersome to make frequent transfers and transactions between your personal and rental accounts, having a clear, separate record of your rental income and expenses can be a real boon when tax season rolls around. It also helps you get a clear picture of the profitability of your investment and can protect you in case of an audit.
One common approach is to set up an automatic monthly transfer from your personal account to your rental account to cover your portion of the mortgage, taxes, insurance, and other expenses. This way, you'll have a consistent record of these transactions.
Remember to consult with a tax professional or a certified public accountant familiar with real estate to ensure you're following the best practices for your situation. They can provide more personalized advice that takes into account the specifics of your situation, your local and state tax laws, and federal tax laws.