Hey your floor plan looks almost like mine, but yours seems a bit bigger? More than 70sqm? My bedroom doors face the living room rather than each other and no storeroom. Initially my budget also 20k, but finally I decided it is impossible as I need to hack and do floors, change kitchen wall tiles, and a whole lot of other stuff. So I signed up with a contractor for 25.5K (and the cost is still creeping up as got more things that I felt necessary to do, though I also don't know how long I would stay there.) Hacking is very ex due to haulage, so if you can hack less, save more money. once you hack the wall between living room and kitchen, need to redo the waterproofing, and level up the floor to living room height, so additional money. The Lbox also ex, and I gave up on getting it. Sigh, every thing, even those that seems small, add up to be a lot of money.