A car forum that I'm a part of, and I know the owner of the forum, told me that the dedicated app required constant work and updates as phones and operating systems changed. 

For newbies, I recommend starting with a turnkey cash flow rental.

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

Once you hit a certain number of loans (check with your state dept of banking and finance or dept of business regulation), they might require you to have a license.

Refinancing: If the lender doesn’t approve, refinancing under the LLC might be required, but LLC loans typically come with stricter terms and higher rates.3.

It requires hard work, strategy, and a willingness to take on projects others might overlook.

You state, "your lender" - I admire the loyalty but also would recommend you get a minimum of 3 quotes (at least two from mortgage brokers).

For example, a property in San Diego may lose $500 per month ($6,000 per year) but gain $60,000 per year in value, making it worthwhile to "lose" money each month in exchange for long-term gains.I recommend you start with BiggerPockets Ultimate Beginners Guide (free).

If we meet a resident through an OTA, we enjoy certain protections with that platform, but if, at any time, the resident wishes to extend, but not through the platform, we require the same background check, credit check, and eviction check as for anyone else not booking through an OTA. 

Wait until it's close to the end of his lease (know what the law requires) and then give him notice that you will not renew.