What's the location, purchase price, expected Reno cost, ARV, etc.?  

Do you understand the added complexity, work involved, and costs? 

Exceptional comparative value and lower operating costs. 

We're looking to gather info about likely cost, pitfalls, time required, considerations when obtaining financing, etc. 

Where is the property located.assuming the seller added the ADU and did not disclose the ADU in disclosure forms, you may have recourse (depending on the rules of your jurisdiction) but it may cost you some legal fees. 

I think the house flows really well in person (open floorplan, high ceilings, large house with spacious room sizes) and you just can’t represent that in 2-D photosI’m honestly not sure how to do a video or 3D virtual walk-through or whatever, I haven’t looked into it and have no idea how much it costs.

@Jonathan SniderFannie and Freddie do have LLPA's and the lower the down payment, the higher the cost.

This may not seem like a big issue, but if you're paying for premium data, like I am, it can drive up your cost per deal drastically.I switched to REI Reply last year and can send off over 2000 texts in one drop.

If you are raising money in a syndication raising less than $1M can be challenging due to the setup and ongoing costs to manage and run it.

If comps are scarce, you might also consider the replacement cost approach, looking at what it would take to rebuild and adjusting based on market conditions.