Two completely different materials. Decide what your priorities are and then decide if the stone will satisfy your needs.

While change the bathroom fixtures and tiling seems simple those elements account for more than 1/2 the cost of many bathrooms. You can estimate the cost to remodel your bathroom with this online calculator http://www.remodelormove.com/bathroom-remodelling. A budget of $2800 will be tough - it just depends on which fixtures you pick and who does the tile installation. Tile installaton will likely take several days maybe even a week depending on the design and type of tile. You may want to consider other materials like solid surface or engineered flooring that will be less expensive to install

go to a lighting show room, take pictures of the space and any ideas you have. They are best suited to help you. also have a budget. the how to part is nice but most consumers have no idea that the pendants above are probably 300.00 each. Budget for lighting! take advantage of the pro's in the lighting world, its all we do!

Personally I wouldn't paint the door and window but if you don't like it I'd paint it a soft white. I'd go for a pale but warm grey on the wall with full length curtains to match and add your favourite colour/s in accessories. If you're not keen on pale grey I'd go for an off white with a yellow undertone (farrow and ball do some great colours which would work) IF you can get an upholstered bed I would but if not add cushions and a throw. I'd also add a rug under the bed for softness. Do you have a ceiling light? A mirror and some great art would complete it. I wouldn't add a curtain to the wardrobes, I don't think it needs it