I scoped the main line and found that a pipe in the basement has completely rotted away.

The home inspector thinks it’s an issue for fha.Secondly, there is exposed live wires in the main house attic and remodeled garage attic.The sellers realtor has been a bit difficult to work with.

I have a 4-unit property in Maine that I provide heat & hot water that are currently off of the oil fired boiler. 

If you can't separate utilities, then the "main" original part of the house would be paying the smaller units utilities. 3) Fairly splitting the parking and yard space is another issue that comes to mind

The main requirement is that any property purchased in an opportunity zone must be purchased through an Opportunity zone fund.

@Jared Smith I own 20 units and also mainly work with investors as an agent!

Cap rate and price-per-door are two of them.But your main concern is not finding deals in your local market, Denver. 

But FHA is the main law you need to worry about.

For those with previous commercial real estate experience, what main things should I be looking into or asking?

The main reason is the challenge you'll face when trying to resell it later.