I haven't been particularly involved in wholesales, but have been heavily involved with full gut renovations and add-a-level projects (since 2010).  

Why are they vacant, what are they worth, what is your skill level and what are your personal goals.

How you will maintain your rent at it's current level if tenants will be looking at a $50/m water bill?  

It has already started to soften or level out, not sure to what extent.

So maybe try the add thing and get a feel for the level of interest.

For an area to qualified as an opportunity zone, the census tract must have at least a 20% poverty rate and 80% of the median income must not exceed 80% of metro or state level.

I’ve seen new construction properties in AAA+ areas get trashed at mind boggling levels.

If it seems to be good to be true, IT IS.If you don't have intuition (it's a personality type, not a learnable skill) then seek the advice of someone who has it.

I was reading something similar to what you are suggesting is that they take a little to heat up.Do you run the ones with individual thermostats and if so do you find complaints about tenants having to set each room or vice versa do you set a each level on a seperate thermostat.The unit I am looking at is about 900 sq ft as well and I am hoping to heat it exclusively with electric but want to be sure ahead of time that if I spend the money it will work.

SO keeping the debt to income ratio at an acceptable level can be challenging.