Most property management apps are built for LTR or STR.

Get an attorney and get these losers out then hire a property manager to properly vet any future tenants! 

I like to think I have done ok. for me finding properties is sales - managing real estate and growing your company requires problem solving. 

I’m not going to replace toilets for that, but when the time comes and they need to be replaced I will replace with old school toilets that can manage the crappy situation.

How much of a pain will it be to manage tenants?

If you manage to get this off the ground and do some verified - meaning paperwork is in your name, or company's name, etc - projects that turn a profit, and you build some capital in a bank, you should be able to go right to that lender after a year or two and start a relationship no problem.  

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But I’d be amiss if I did not suggest that instead you gain knowledge of the aforementioned 3 foundation by studying for a real estate agent/broker license, and then seek employment with REITs, real estate operating companies, real estate managers, or real estate brokers.  

Real estate agents, property managers, and contractors who specialize in your target market can save you time and money in the long run.

If you’re not using a 1031 exchange, you’ll need to account for this.Reinvestment Risk: Entering new markets and managing multiple properties may present challenges, especially if you’re unfamiliar with the areas.Alternative StrategiesBefore committing to selling, consider these options:Leverage the Equity (HELOC or Cash-Out Refinance):With a 3.1% loan, selling might not be the best first move.