Use an operating account for income and expenses, a reserve account for maintenance and taxes, and a high-yield savings account (HYSA) like Capital One's 4% APY for idle funds awaiting reinvestment.

Also, depending on your long term goals, transitioning part of your portfolio into more passive investments might help reduce operational stress while keeping your equity working for you.

Quote from @Carlos Lopes: Gross income doesn't matter.This is the number most people post, and it's 92.7% useless.What you need is NET income, meaning the money left over after all expenses, and that should include a dollar amount for your personal time spent operating the business. 

What tools have worked best for you to streamline operations? 

A lot of investors have great success when they start with a deal that has lighter value-add potential and use that deal to learn how to operate a rehab.

Simply document everything you do and create your own Standard Operating Procedures (SOPs).

You're planning to operate this as a STR/MTR.

As an owner-operator you will be able to screen tenants a little more carefully than a PM typically does in my experience. 

Find GP’s who are pretty transparent with things like monthly financials, monthly summaries of operations, etc.

We operate primarily in the Southwestern US and New England area.