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Or what are some other categories?

They fit in the "too good to be true" category. 

It depends on when you are showing more profits and what category those profits fall within.

With that said, a good PM is worth their weight in gold.

Don't know your area, but yes, a good agent is worth their weight in gold and can get you substantially more for your property.

Cash offer do carry weight as they can close quicker, don't need appraisals etc, but as an agent that works with buyer and sellers, I've seen it many times where a seller will pick a different offer due to some connection to the buyer (ex military, young married couple just starting etc) They want to know its NOT going to an investor specifically. 

Owning Your Business Vs Operating within another businessI agree, owning your own business would be awesome, but this falls in category No. 1 -- it sucks, but what can you do about it?

I'll just re-emphasize that your planned improvements will add a lot of weight to the structure.

At the end of the year, I also usually get an annual statement summarizing all of the fees by category for my taxes.