The home should have gutters throughout, and downspouts extending 4' to 6' away from the foundation.

In NJ, a landlord cannot refuse to renew or extend a lease or month-to-month just because they feel like it. 

In the last 20 years I am confident there are more areas that have ceased to cash flow (areas like Detroit if purchased near 2008) than there have been rate issues refinancing or using ELOC to get appreciation out of a property (because there have been no significant rate issues refinancing in the last 20 years as long as you qualify for the refinance (i.e. are not over extended)).Anything is possible but what you point as an issue has not been an issue in a long time but purchases less than 10 years ago that cash flowed have ceased to cash flow (not in all areas but it did get some expert/experiences investors: Ever hear of Mike Butler? 

Do not wait until you're in your 45 calendar day identification period.2) Enter into a contract for the purchase of your replacement property with an extended closing., And attempt to include options to extend the closing date should you need to do so in order to buy more time for locating suitable replacement properties.3) You can try to lock up your potential replacement property through the use of leases, leases with options to buy, or just options.

This extends way beyond investment advise, but important and true none the less.As for diversification, please do not confuse an active investment from a passive one.

I am also extend by search toward fall river and Plymouth area , 3 family there is about 250k.

If you are attempting to operate as an unlicensed broker on million plus dollar homes that you do not have a direct ownership stake in (no, a sales contract is not a direct ownership stake), then you likely have problems that may include but also extend beyond those mentioned above.

Then use chem sponges also referred to as dry cleaning sponges (Quick tip: You can tear them in the middle like opening a sandwich and get double the use out of them and get a pole that extends with one of those plastic adjustable mop head clamps) to wipe everything that's left.

For the deal to work for me, I needed $375/month payments, so he ended up agreeing to extend the loan a few years so I could be at my lower monthly payment.  10 or 12 year loan (can't remember).  

The income from the property should help you get qualified  The seller had his family and extended family living in the house.