The process of buying, getting a loan and settling to closing was extremely smooth.

Are there any investors looking to team up and any lenders for buy and holds and new construction?

Cash flow approximately 350 a month.Option 2: Use the cash to buy land to build a 6 bed 4 bath duplex, all in cost approximately 300k/330k. 

Are you agent yourself and what makes you say that you'll avoid buying a home under 1000 sqaure feet again? 

BiggerPockets also has a calculator to analyze deals, and I highly recommend you start this as soon as possible, even if you are not ready to buy.

For lending, your rates are going to be higher than if you were to buy under personal name.

One thing you might do is sell your more expensive properties and buy less expensive ones. 

I would recommend you look for a good neighborhood to buy a multi family in.

You should do all the same level of due diligence you otherwise would to buy the property. 

I would suggest that you find a partner or mento who has done it before.Many of the investors that I work with in your position find that buying New Construction investment property from a builder is a better option.