Aside from that the biggest value add areas I see are as follows: Kitchens, Bathrooms, decks/patios (if added), additional rooms/bathsKitchens and bathrooms tend to be the go-to, but all of those can help you get the most bang for your buck. just keep in mind that if the area is already of high quality, then it may not be the best area to spend the money vs something that is blaringly in need of an update.

Mind Excess Business Loss Rules.

Have a few areas in mind that typically have good options. 

Like Covey wrote, begin with the end in mind.

To make the job flow easier, but also (mainly) to protect myself if a customer changed their mind later ( which was common).

So keep that in mind when you get your loan. 

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They don't mind.

No one in their right mind is going to file a lawsuit over 2k.. they may and should just take you to small claims and or as Greg stated file their lien and wait.Also work done to YOUR satisfaction is a pretty weak argument and totally subjective.

but if you are just looking for a use that requires minimal investment, your hosting of farmers markets etc is where my mind goes also.