I think it would really depend on how tight the timeline is, whether they are planning on doing a 1031 exchange if they were to roll into another investment, whether the tax savings on the 1031 outweigh the loss they may take rushing to sell within the timeline, and the location and condition of said duplexes.  

Do you have info on the condition of these units?

If you can acquire a good property, good neighborhood, good condition at a good price AND you won't lose money month to month... 

The owner wants $60k for it, the two apartments are move in condition and rent for $600 & $750/month, taxes are $4k/yr. 

So to sell one property out of the portfolio loan you must pay a 20% margin above that portion of the loan.The rates change based on the condition of the property as defined by the appraiser as good or average.  

I'd say 30 days is a reasonable average to get from vacant to new tenant move in but this can of course vary based off property condition/desirability, competition and amenities provided. 

It was in poor condition with some of the following problems:No hvacPast termite damageWater damage in multiple areas with active leaksAluminum wiringPoor layoutGrading issuesFoundation issuesWe did some numbers and estimated the rehab to be close to $100,000.

We're planning on using our proceeds to use an FHA 203k loan which we can use to buy a 2-4 unit in poor condition that we can do a live and flip, plus househack.

For a 3/2 house between 1300-1600 sqft in good condition, $1500 is a conservative estimate for rent. :)

She said yes about 51K and then explained the conditions etc...