Hello, it is really time consuming for me to analyze each property by manually entering its data to calculate the return.

So either you pay for the repair out of the idle cash in your account, file an insurance claim and use those funds, or rollover/transfer funds from another retirement account to cover the cost. 

Their permit will not be transferable when they sell though, according to the draft plan.

So, things change a bit.If it is his personal home, there are more restrictions.For an investment property, if you take over his financing, read through the deed of trust (mortgage) and see how they handle transfer of ownership.

The data @Devin Conley posted is pretty solid from my experience (I do not know Devin nor how he sourced the data, just going by my own investing experience).  

When transferring real estate as a gift, it does not receive a step-up basis, as it does when it has been inherited.

., fractional ownership transfers).

Sometimes, properties owned by non-profits have deed restrictions, zoning conditions, or agreements tied to their use.Tax Considerations: Non-profits often hold tax-exempt status, so you’ll need to ensure that taxes are assessed correctly once ownership transfers to you.Potential Public or Internal Scrutiny: If the transaction appears to undervalue the property or is perceived as exploiting a non-profit’s resources, it could lead to reputational risks for you or the organization.

Does anyone know where you could find median income data by area in Portugal?

I think this is something many investors miss - which is many offerings now all have the data publicly available.