OP the good thing about BP is varying opinions and also objectives.  

I have seen costs vary widely from contractor to contractor and you want to go in with all eyes wide open. 

You touched on something else important Elliot which is that some of those 'losses' in heat affect/warm areas of a multi-unit in ways that could vary significantly from one building layout, climate, etc to another................................................................................................................................................................................This is a real estate investment forum so the main audience here are investors, not engineers.  

Setup costs vary: Tier 1 (online services like LegalZoom) costs $50–$300 plus state fees (~$99 in Ohio), Tier 2 (with an attorney) costs $500–$1,500 for tailored structuring, and Tier 3 (with a specialized attorney and CPA) starts at $2,500 for complex setups.LLC will not save any taxes and would still be reported in your personal taxes if LLC is SMLLC.

For most people, owning their own home and house hacking is typically the best way to get started building some equity, enjoying tax benefits, understanding real estate, and reducing their monthly housing expenses, but it really does vary by person and what they are trying to do.

Do the laws vary from state to state, and if so, is anyone familiar with the laws concerning this in West Virginia? 

I look at every property on its own merits.I know others will disagree and that’s great, the more varied the perspectives the better.

It varies greatly on if your wire is underground or above.

There's no right or wrong way to do this, just varying levels of risk and the only proper route is the one you understand. 

It varies deal to deal, on one property maybe up to 65% LTV, but if you have more collateral the more likely they can make something work.For example, I've done numerous deals where we place a 2nd on 4-5 properties and the lender feels comfortable lending x amount of dollarsThese are very non traditional loans and no two will ever be the same.