With the city contemplating expanding the ADU ability to city wide, is there any benefit to doing a rezoning now (assuming successful) before the citywide expansion takes place?

And, factor in the depreciation and other tax benefits, deductions, home office, vehicle expenses, etc. 

What may seem like a benefit (NO MONEY DOWN) is actually a curse!!  

I think you would benefit from researching other markets with the capital you have etc.

More like a 101 of taxation: you had a reserve of losses -> it helps when you have profits.And a tax geek addendum:I also do not see a direct link to cost segregation benefits here.

If you’re comfortable with a bigger investment, a duplex is good for the benefit of additional cash flow and you could house-hack.

Find someone where there is a personal connection and at some point your relationship now or later can benefit the mentor.

Quote from @Pamela Rivas: Hi Natasha,Here are some key points to consider about setting up a Mexican corporation:Setup Costs: $1,500–$3,000 USDOngoing Costs: $1,000–$2,000 USD/year (accounting and tax filings)Benefits: Tax deductions for expenses like maintenance, repairs, and managementBest for: Multiple properties or income-generating investmentsWhile a corporation is ideal for managing multiple properties, it’s NOT required to obtain an RFC.

@Bradley Buxton makes a very good point to make sure to do your due diligence as you won't be an owner occupant like your in-laws.Last bit of advice: Because this is a friendly deal, you want to take your time to make sure you structure it in a way that maximizes tax and cashflow benefits for both parties. 

I'm with you that sidewalk slip and fall litigation may be less likely in the Midwest than say Mid Atlantic which tends to have more litigious cities but dismissing premises liability issues can come back to bite an investor and when these properties have such razor thin margins that an investor must consider the cost benefit analysis of safety against ROI, there is a real estate issue and is usually a losing proposition.