For instance, most track builders build in a crap-ton of fluff into the price of the house so they can provide a "credit" (like $15K or more) toward closing costs if and only if you use their lender...where they can charge whatever they want.

Very unfortunate in these instances.

Its a pretty rare instance this  happens but it is in most debt instruments..

For instance, spend $10k on a kitchen remodel, increase your value by $8.5k (or whatever, but it's always less than the expense).I figure I must be missing something, because BiggerPockets is full of investors talking about their contractors, etc.

I thought in some instances married owners were treated as one, so I'm not sure.I think the issue is how is the NC taxation filed. 

Many bigger firms bill per form basically or instance of.

For instance, a claim filed under a federally declared natural disaster is most likely looked at very differently than a claim for a leaky pipe. 

Barbara Corcoran is famous for doing that (before it was called BRRRR).

I had one bad instance early on, but AirBnB paid me out on it, but have been clear in my messaging...have ring cameras at all entrances (and make sure this is clear in the listing) and then let my guests enjoy themselves. 

The cost of the materials was $1,500, and including labor I’d estimate this cost me about $3,000.The property manager never ran this by me or gave me an indication these project would be completed.Our service agreement is clear that written consent is needed when costs exceed $1,000 and in this instance these were not repairs and requirements needed to rent the property.