I'm giving my 2 cents here as a former Cooperate manufacturing Project manager gone Property Manager:I think the pay structure you have currently is an awesome start! 

Balloons coming due with higher interest rates, China market, China production, Manufacturing production moving back to the US, Worker shortages, Workert pay hikes, Ukraine/Russia food and fertilizer misses, Oil prices increasing due to the OPEC Q1 production curtailments in place, Houthi issues, Panama Canal Water issues, Illegal immigration impact (buy one of those office buildings and rent for $10mm per year for Illegal housing, take advantage) social benefits required, Climate change believe it or not- Buy or sell into that thought process,  US politics, Baby boomers leaving workforce and needing more benefits, Baby Boomers moving from Stocks to Bonds,  etc.I agree things will get worse, but that means more investing opportunities. 

Intel is a great example, who is building the largest chip manufacturing plant in the US right here, and it will be a $20 billion dollar investment that brings a few new thousand jobs.https://www.dispatch.com/story/business/2022/01/21/intel-ohio-building-computer-chip-factories-licking-county-jersey-township/9173472002/ Another example of economic growth is the upcoming Ohio State University Wexner Medical Center Inpatient Hospital which is a 1.9million square foot hospital that will bring over 800 new beds and a thousand new jobs. https://abc6onyourside.com/news/local/new-osu-hospital-expected-to-transform-health-careHere are a few more recent investments https://www.10tv.com/article/money/business/hydrogen-power-company-hyperion-bringing-700-jobs-to-columbus/530-25907aab-5517-4661-a9f3-d2ed2d5be6b0 https://news.wosu.org/news/2022-02-08/rumpke-to-build-50-million-recycling-facility-in-columbus Check out The Complete Guide to the Columbus, Ohio Real Estate Market which goes through the Columbus, Ohio market in depth and will give you a better scope of where the highest levels of growth are taking place and where to look to invest.  

The local economy is supported by several diverse sectors, including healthcare, manufacturing, and retail, which sustain employment levels and underpin rental demand.

I highly doubt a Chinese modular home manufacturer is going to be even remotely familiar with US building codes. 

I think in this market the buy and hold or BRRR are the best because of the historical above average appreciation growth and the tech and manufacturing jobs moving to the area. 

If it has gone up and down rapidly, then that indicates a boom/bust market (typical in areas without a diverse job market such as areas where all of the jobs are in tech, energy, manufacturing, a single employer or supporting those workers for example). 

I currently live in the metro ATL area, but have history and ties in Charlotte and Chapel Hill (Both NC).For work, we focus on logistics, senior care, and manufacturing.

Nevada has many of the draws of CA and the added benefits of low property taxes that don't assess on sale, landlord friendly, no state income tax, and multiple tech and manufacturing jobs like Tesla, Apple, Google in the area. 

You can manufacture transactions on there.Debt free, but they have over 3k in collections?