I also really liked the bathroom.
You can find really great stuff at flea markets, craigslist, yard sales, etc. so it's not so much cost, but whether the look feels cohesive, and your friend needs to do a bit more work there. I would suggest a different color, maybe a darker taupe on the living room walls to work better with that teal colored sofa and pull together the colors.
I liked the dining room, I would suggest adding a rug in reds, teals, and browns that will work with the living space and make it look finished, especially if you change the paint color.
Bedrooms are okay, put some art on the walls, black and white photos would be a nice off set for the pink room. Throw pillows also help make a space look finished and more upscale.
I would add a little more flowers or something to the outside, but that's just a personal preference, I understand that stuff needs more maintenance.
I did not like the dot thing going on in the kitchen, but I'm sure a lot of people will find it charming/funky.