If its a volunteer fire company you may be able to donate the house to them for the purpose of training and get a tax deduction .

Shouldn't be any extra taxes involved.

Prioritize properties with strong rental potential and set aside reserves to handle unexpected costs.Finally, familiarize yourself with tenant laws in your target market, especially in Portland, and consult a real estate-savvy CPA for tax efficiency and legal considerations.

I put property taxes 6k/year on each(Even though that's way higher then what it actually is, but the county tax estimate says its around that much for each) and for insurance, I just put 1,100/year on each.If there's more info needed let me know.

I wanted to share the numbers and want to make sense if it's a good deal for us according to what we are looking for.Price: $450k (agent said that we can get it down to $420k)2 Units (1 bedroom in each unit)Mortgage with 3 year fixed comes up to around $2.3kInsurance and tax is roughly $400Rent per unit is $1.4k so if we move out then total rent comes up to $2.8kThere's a detached ADU (garage) that can give us another $100-$150 if we rent it for storage and there's a scope of converting it into another unit later on.So currently rough calculation says that it can cashflow up to $300 per month.

How long will they have to cover property taxes etc for the decision they make?

you have to also classify what do they do for a living those of us that are Real Estate Professionals and taxed as such to most its a lifestyle I know it is for me.

@Claude Diehl,You don't need a CPA or tax expert here; this is a straightforward transaction.

I am not a tax expert, but here are my thoughts. 

I target pre-existing, non-conforming lots that town assessors have deemed unbuildable either through a land use code or a very low tax assessment.