This is where we spend a lot of time.
A property can be cashflow-positive on the day it is purchased and still become difficult to hold later.
So we put pressure on the assumptions.
What happens if interest rates rise?
The property’s rent does not automatically rise because the investor’s mortgage becomes more expensive.
If the investment has only a narrow cashflow surplus, a rate increase can remove it quickly.
This is particularly important for highly leveraged investors.
What happens if the rent doesn’t reach the appraisal?
Rental appraisals are estimates.
If the investment needs every dollar of the appraisal to work, we want to know what happens when the achievable rent is lower.
What happens if a tenant leaves?
For a conventional property, a vacancy can temporarily remove the entire rental income.
For multi-income strategies such as co-living or dual key, the effect may be partial.
Either way, vacancy should be modelled before purchase.
What happens when operating costs rise?
Insurance, maintenance and management costs change over time.
Specialised properties can have operating costs that differ materially from conventional residential investments.
A useful feasibility leaves room for costs to move.
What happens if capital growth stays flat?
This is what I sometimes call the Three-Year No-Growth Test.
Assume the property does not increase in value for the next three years.
Would you still be comfortable holding it?
Does the rent support the expenses?
Does it continue helping the portfolio?
Would you feel pressured to sell if the expected capital growth took longer to arrive?
Property values rarely move in a straight line, so an investment strategy that depends on rapid growth arriving on schedule deserves closer examination.
What happens if you need to sell?
Cashflow is only one part of the investment.
You also need to consider who might buy the property from you later.
Some specialised properties have a narrower buyer pool than conventional homes.
That does not necessarily make them unsuitable.
It means exit liquidity deserves attention before purchase rather than when the investor eventually needs it.