and deal with power lines, water lines and sewer, maybe seal the well. 

But it should only be attorney cost, the deed and recording fees (few hundred) , maybe a final water cert.

Are there separate gas, electric and water meters for each apartment?

Improve the grade if water flows toward or pools near the house.

Breach of contract makes you liable for damages, but isn't a criminal act. 

Labor/material are going to be different and need to factor that in4) new roof, new HVAC, new water heater, ac panel, replacing plumbing to PVCThese are very variable, if you are getting this from a licensed guy to do it and unlicensed.. is it a big shop or a local shop doing it, is the GC doing it they will put some money on the top so it will be more money5) framing (creating new bedrooms or baths)I would get all these quoted from a good couple of licensed guys and unlicensed to know your numbers to cents

What type of MEP work are you putting into the design for getting the sewer, water, power, and internet (assuming you're not extending gas) to the inside of the building? 

@Denise Lang some copy & paste thoughts:TYPES OF RENTAL INVESTMENTSRecommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

You mentioned that you've been paying water / sewer for all 4 units. 

I was born and raised there, so I am very familiar with flood and wind damage from hurricanes.