One of the largest cost is going to be in bringing the lines (gas/electric/plumbing) over and of course the drains for the waste water. 

I put solar panels and a tankless water heater to minimize utilities since they are not truly split.

They included:-she was so upset with MW, she didn't want to pay any rent as the furnace wasn't working-she ended up paying $800 for November after the furnace was fixed (we had agreed to this due to the inconvenience of the furnace)-she got COVID and lost her job-tenant missed three months of rent-tenant wanted to stay and agreed to pay $1300/month until she was caught up-tenant pays $1300 in March 2021-tenant pays $1200 in late April 2021 (if I remember the date correctly)-I never see another dime of rent-tenant eventually leaves (I forget if it was the $250 I offered her for the keys or Saunya's threats of evicting her)-tenant has close to a $3,000 water bill that was outstanding!

It's been fine for 4 years and now water has found a new way along the wall.

not cleaning the hvac filters and the AC stops working, etc. 

For a first investment property though, I’d recommend staying away from foundation and structural issues, or serious water damage.

In WA It also means carbon monoxide and smoke detectors and water heaters are strapped. 

I am in need of replacing all the window because I noticed that water is getting inside the apartments and is messing up the Interior drywall.

I'm wondering is there any way you guys would recommend filtering my Dealmachine list?

Which is what it sounds like you're asking for.I've bought my rentals by setting up zillow bring up zillow filter alerts and realtor.com filter alerts..