Vacancies are expensive and destroy your cash flow. 

Is vacancy low and they plan to lease it up?  

Get as long of a mortgage as possible (eg 25-30 year mortgage) to make your payments lower.If you are buying to rent it and won't be living in it, you need 20% for a down payment.Either way, you also need money set aside for closing costs, inspections, repairs and maintenance...and if you are renting it out to cover vacancies.

That could be anything from not accounting for capex/repairs/vacancy in their calculations or a complete lack of knowledge in how to calculate their future property tax obligation (this is a big deal in Michigan).Just the other day I had a call with an investor looking at a 10-unit property in Detroit.

The lease termination fee needs to be paid at the time they request this, do not substitute the security deposit for this purpose.This will ensure compensation for time, money and effort needed for a tenant turnover, including advertising and showing costs, regular repairs, utilities during vacancy etc.

What are you using for vacancy %? 

.- Mobile’s low cost of living and doing business provides a desired aspect to renters that can’t be achieved elsewhere, which provides a steady influx of renters thereby decreasing vacancy rates.

Here are some key highlights:Massive Construction Boom: With a staggering 280.8 megawatts (MW) under construction by year-end, Hillsboro’s data center inventory is poised to more than double, according to a report just issued by CBRE.Rising Prices and Low Vacancy: Average asking prices climbed to $147.5 per kW/month, reflecting increased demand.

A couple months of vacancy or repairs could put you behind the eight ball.You could always sell the duplex and take the equity and roll it into something bigger.

Also every market is different for vacancy.