I would not waste too much time because it sounds like she is in no rush and quick cash will not be a life saver for her.Also, advise her to consult her own contractor to see what repairs would cost for her own knowledge.Most importantly understand there is a good chance the Realtor will take the listing at the inflated price.

Is it possible to (and/or advisable to) draw a home equity loan against my primary to bridge the shortfall for the downpayment and help me acquire the property?

I was advised to use laminate, not vinyl plank, because the vinyl would look cheap.

@Leslie A. gives some great advise about mobile homes and I enjoyed her comments with regards to people having their negative opinions about the industry.

Just got done with podcast 49 I think or might have been 50 but I heard the best advise I could get.

From there we can better advise you.

Also, bankers are not financial advisers.  

The inspection will fail for serious items like dead battery in a smoke detector or trivial items like missing 1 screw on a outlet or switch cover plate.Faill the inspection and they will advise the tenant to move out!

I can't advise you on what to do.

Good luck in your endeavors and I'll check your updates and be glad to offer and advise along the way.