Some rules are that on a 3 or 4 unit , FHA has a Self Suffiency Test to meet, that means all rents from all 3 or 4 units, even the one the owner will occupy, have to at least meet the total monthly payment including property taxes, home insurance, FHA monthly mortgage insurance.

They cannot do this on SFR with ADU however.3-4 unit properties have an extremely tough time passing the self sufficiency test fha loans have to qualify so I wouldn't waste time on 3 or 4 unit using fha.

You can still have an oil tank soil test contingency, however you will only be able to do boring holes around the tank and have the soil tested.

Im looking to buy my first duplex and would like to test the waters with a lower priced property. 

In the meantime sell to a buyer that is able to perform.I'm not offering legal advice and the last test I passed was for Covid, so please consult a lawyer or at least someone who's done business in the state.

You could obviously test it out in a few new Leases and see how it works out. 

We usually go through and test the outlets with a night light and switch them out at turnover.

I have a contingency in place for the soil test to ensure there is no contamination, but as it's fully operational does it make sense to immediately remove the tank and install an alternative heating source? 

If those areas fail the sniff test, KC is on the radar.   

Also, sometimes it's just the seller testing the market with an extremely high price and they aren't really that serious about selling.