I'd be happy to have a conversation about good investment strategies for this area based on what you're looking for.

Based on the information in your profile, it seems likely that this is your one rental property although you mention in your profile that you also let out rooms in your own home.Out of your four options I think the worst is No. 4.

Insurance is likely 100 a month based on other parks I own in the area. 

However, if you work with insurers based in Northern NJ you will have no trouble finding something that works. 2-4 unit properties are in abundance here and are often being house-hacked. 

Determining exactly how beneficial is based on a multitude of factors, but a cost segregation study cost/benefit analysis on your property is typically free and can help you decide whether the benefits offset the cost of the study.If a Cost Segregation Study had not been performed on this $560,000 single family home located in Phoenix, Arizona, it would have had first year depreciation of approximately $20,400.

Employed full time and had just picked up a couple rental homes.

I'm here because I don't understand and I'm coming in with assumptions based on my own taxes over the years and you've kind of put me down or made fun of me for being "surprised" at how the tax law works.  

Usually comes up the other way when they leave the state and turn their old home in to a rental and keep it registered as owner occupant.)It’s defiantly the reason I will never spend 183 days in MN and NV remains my home base.

Purchasing from overseas, I made my offer based on the advertised info and, believe it or not, did not uncover that 2 of the units were just 1b/ 1ba until after due diligence. 

@Yang Zeng Welcome to the Bigger Pockets.As you can see in my profile, my business and hub is in San Diego, not far from you, but all our investments for myself and my clients are in well performing markets in the Midwest.We specially in this out-of-state- approach that really requires more than just the properties.I agree that you should keep a reserve and not spend all your funds but I could help you with 6 properties that would pay you about $5K/ month in cash flow or $60K/year based on your available funds while having about $100K reserve.I like to help you see the performance difference between our area in CA and the Midwest.