In my opinion, if you spend €5,000, you'll get it back on the double. Not only that, if you don't do some cosmetic work to the kitchen/bathroom areas, you won't sell the house at all unless you're prepared to do so at rock-bottom price. Get rid of all carpets, put down laminate flooring, paint all walls, ceilings, doors etc. including outside (first impressions!), don't need to buy appliances for kitchen, but you should install some basic cupboards to give an idea of the potential shape and outlook. Good luck!