Underground electric is 6 week leadtime.  

That includes septic, electric, water, and road access.

You don’t want liability issues from DIY electrical work.

Each unit has to have separated utilities (water, electric, gas, plumbing). 

Helps with your debt to income, better opportunities at cash flow, and typically requires less down to purchase.In regards to challenges, I usually build in an extra 10-15% to deal with things that I can't see behind the walls, including dry rot, electrical or plumbing issues, etc.

I have tenants pay all utilities that they can impact the cost (water, gas, electricity, cable/internet, etc).  

Even small cracks around trim, baseboards, electrical outlets, or drywall seams can carry sound surprisingly effectively.

That said, to maintain a more full-time workload (30+ hours per week) and potentially step away from my electrical contracting business, I may need to supplement with a few flips each year.

The Inspection helps ensure there are no serious issues, such as a leaky roof, a faulty electrical system or structural defects. 

My plan was:   - Phase 1 - All infrastructure (retrofit, fire, water, electrical), + 3 units on top 3rd floor.