Sorry don't know where your villa is situated but have a suggestion. Is it possible to fly out for a long weekend? You could then either take with you an inflatable mattress as temporary bed or book into a hotel. Source the furniture you want and arrange delivery for your return visit in July/Aug.
Most furniture stores have beds in stock which they can deliver either that day or the next. Depending on the time you visit the store.
If you do decide to camp in the house then you'll also need to take a table lamp with you. Unless of course there's a Carrefour or Ardy's nearby which have a good selection of lights. I managed to get a mother and baby lamp stand in Ardy's for under 20e.
When I bought my house I stayed at a friends for the first couple of days, I went to a store in the afternoon to buy the basics, beds, setee and fridge/freezer, which were delivered the next afternoon. I gradually added extra pieces over the years, I made a few mistakes but still have most of the items.