I am currently showing you in position #9 for that term. I took your content, did a word count and counted how many times 'marketing budget' was used. in the article you used it 8 times within a 969 word article. Your big competitor (INC) used the term 5 times inside a 1,162 word article. #1 position is INC.com followed by, Microsoft, About, Wiki.. These are all big players in the Google rankings and hard to compete with.
Due to the nature and competition of this keyword I am not going to suggest re writing.. I would setup a few more pages, with similar content about marketing budgets.. maybe not only for small businesses but for big ones, maybe tone down the use of the keyword, add some variations to it! Make about 2-3 new articles like this.
Track these new articles. They should have different titles, number & variations of keywords, URL's. Take note on which performs better than the others. After some time has passed.. take your better article and make those subtle changes to your article. Maybe change up some of the keywords, improve the URL and maybe put your keyword closer to the beginning of your page title.
(I do not want you to make these changes to your current article yet). I am not sure how it will affect it's ranking.
When you get your articles tracked and they start to improve on rankings, go ahead and link to your already ranking article from the new ones.
Hopefully over time you will be able to get back into the top 3!