Here are two ways to make your kitchen renovations more budget-friendly.
Work with your current kitchen furniture
Rather than having your renovation contractor build furniture for the kitchen from scratch or ordering lots of new furniture pieces, you should try to work with your current kitchen furniture. For example, if you have a wooden kitchen table with chairs, but you'd like the kitchen to have a breakfast nook with a built-in bench and table, you should see if your contractor could use the old table and chairs to make some or all of this new feature.
They might be able to, for example, refinish the table and perhaps alter the tabletop's dimensions to make it fit in the designated breakfast nook area, and then use some of the wood from the chairs to build the bench seat itself. If they have the skills to do this and the kitchen table and chairs are in relatively good condition, this could be a worthwhile project, as it would be cheaper than ordering brand-new construction materials to build this breakfast nook.
Don't overspend on items that will only be used occasionally
When you have a small kitchen renovation budget, it's important to avoid overspending on items that you won't get lots of use out of, as this may result in you then not spending enough on high-quality items or features that you'll need to use on a daily basis. For example, it's important not to overspend on furniture items for your kitchen that you don't expect to use too often. If, for instance, you're having a new kitchen island built and need to purchase bar stools for this new feature, but you're planning to eat most of your meals at the breakfast nook you're having constructed, then it's best to order inexpensive bar stools, as even cheap ones are unlikely to wear out too quickly due to how infrequently you'll be using them.
In this situation, it would be better to devote more of your budget to the breakfast nook (as well as perhaps the benchtop for the kitchen island, in case you plan to prep food on this surface each day and use it as an occasional dining area). Using low-quality materials in these high-traffic areas is likely to result in them deteriorating quickly, so if you don't have the budget to replace these items, this could result in the beautifully renovated kitchen not looking good for very long.