Quote from @Gary Aragon: Quote from @Rick Albert: Our electricity is already separate and we designed our ADU to be all electric so no gas. 

Assumption by an EntityUnfortunately, assuming a VA loan directly through a legal entity (such as an LLC, corporation, or trust) is typically not allowed because:Primary Residence Requirement: VA loans are designed for owner-occupied properties, meaning the assuming borrower must intend to live in the property as their primary residence.Credit Review: The VA and lender require the assuming party to undergo a personal credit and income review to ensure repayment ability, which entities cannot satisfy.3.

Also, it goes without saying that if you make a procedural error (very likely as the process is designed to trip up the unsophisticated landlord, and all tenants have the right to a pro bono attorney), then you have to start the process again from scratch. 

Depending on the state, you will need a designated agent for your LLC, in that state.

Best of luck to you working through the renovations - if you need any design advice, feel free to reach out!

For my personal properties, I design the mortgages so that I'm just above cash flow neutral. 5% of the gross income is a good number I shoot for above neutral.

Yes, it is possible to obtain a second FHA loan, but only under specific circumstances, as FHA loans are designed primarily for owner-occupied properties.

Advice on Layout/Design: For those who have added ADUs, do you recommend standalone units, garage conversions, or a combination of both?

Sometimes minor tweaks to the design can garner their support which is far better than having an adversary. 

And don't forget to factor in design/furnishings into your budget keeping in mind your ideal guest avatar.