I currently own one home in NY as LTR, one STR in SWFL but am looking to expand my portfolio.

It was a 50% of one months rent and a $100 increase in rent. 

So I say selling is most likely your best course but regardless, to grow your portfolio stop doing 15yr terms. 

In addition to this duplex, I have one other paid off with established LOC, and another nearly paid off.

only one avenue to this and that is an equity partner that shares your dream. 

Some private lenders like the one I work with doesn't require appraisals on fix and flip/new construction loans and also doesn't require tax returns/W2s.

@Cosmo DePinto,I’ve seen investors do great in Huntsville—let me share a few detailsIn short, yes—it’s arguably one of the strongest markets in Alabama for a balance between cash flow and appreciation.

Find an older one who'd rather sit back and get the interest than the higher return higher involvement of another flip.

St Cloud MN Duplex, list/purchase price $259,900market rents $1,610 per unit BUT yes, if one really wanted to sec8 income standards are $1,957 per unit so one could go that direction if wanted be.

I own several in Alabama, including one in Bham.