Limited by budget are not big problem if you decide to make over, as long as you can be so creative to manage then find new ideas for looking much better than before. Take research on your future kitchen it would be, look through design books and websites then figure out to make it happen with the budget that you have available. Or you can ask from designers to make it on the list for you to buy it. Then you can shop around depend on your list, you can also try to visit second hand store or visiting refurbishing shop to get your stuff for your new kitchen.
You can remodel your kitchen with a new stuff and property or you can change this lay out. Just like in L and U shaped lay out that have similarity in making all working triangle, your kitchen properties located close to each other. Or you can choose an island shape if you have a large kitchen that look amazing in the right size room, with this you can have an open plan dining and kitchen area.
With your make over you can take something old then make it look new again it depend on your abilities to mix it up and blend all your ideas with the budget that you have