As you develop the park I would strongly recommend your homes be individually metered for water, sewer expense prorated and garbage paid by tenants via individual can service. 

I have some YouTube videos that may help with some of your questions and always happy to have a call to dive a little deeper. 1. which development(s) tends to be the best for ROI/have the best occupancy rates? 

There are a lot of market-specific issues you'll have to grapple with and also, there are plenty of landmines in MFR on its own in CT that you'll have to be ready for, in addition to the nuances and complexities of developing something like this.

I am considering working with a property developer in NJ to buy land, build a duplex/triplex and sell it (6-9 month time horizon).  

Most take near a year in southern Ca, but you hear of exceptions in both directions on that timeline.What some developers are doing here is leveraging the affordability issue and getting permission to build additional ADUs by designating some as affordable or semi affordable units.  

Do you do any development projects? 

The biggest hurdle I see with arbitrage is developing a pitch to use when approaching landlords, which you can probably do with a little research on BP and ChatGPT.

Out of these areas, Franklinton and Linden are seeing some of the most developments.

I grew up in the real estate industry watching my father raise money with a PPM for large multifamily value add projects and a developments.

In Columbus, you can still find the 1% rule and there's amazing appreciation potential due to how much population growth, job growth, and companies moving/developing there (recently Anduril just announced another 4,000 jobs coming to Columbus Ohio on top of Intel, Google, Amazon, FB, Nationwide, Ohio State University, etc.).