Often they will tell you what they're having a challenge with (like finding off market deals, a reliable property manager, etc). 

Study the market.

Recently I saw the duplex that is DIRECTLY across the street from my property come on the market, and I would love love love to jump on the opportunity to buy this property as well. 

I know Austin; I don't know other markets.

You can't arbitrarily decide that you don't want to allocate any of the proceeds to the portion of the property that will create Ordinary income recapture (thus can't be included in the installment sale treatment) - it should technically be allocated amongst all the assets in accordance with their fair market value at the time of the sale. 

@Brian Leseberg  If your portfolio is growing you need to be using a software that will allow online payments.   

I can then re-market it.

I look forward to connecting and growing relationships with hungry like-minded agents/investors that can give wisdom.

Gotta grow mine for sure!

SF houses are easier to maintain, have greater appreciation rates, and appeal to a bigger buyer market.