We have recently done a LOT of work on our house, and I can tell you the prices for the things that we've done. Ours is a 960 sq.ft., single story house in the San Francisco Bay Area.
We refinished the floors in about 850 sq. ft. of the house (two small bedrooms, hallway, livingroom and dining room, not the kitchen or bathroom) at about $1350. Our flooring people were fantastic.
We are getting ready to replace the stucco at an estimate of $10,000. There is some damage under the stucco that the estimate includes repairing, and the fireplace is being removed (structurally unsound - we're going to replace with gas, not needing the chimney.)
We are replacing the (10x10) kitchen with IKEA cabinets and installing ourselves. I know you said you can't do this, but if there is an IKEA near you, they got good Consumer Reports ratings and are very reasonably priced. We're estimating $6,000 for cabinets, counters, demo (including dump fees), and flooring.
We painted the interior, except kitchen and bath, and replaced all the baseboards for $2,300.
We replaced all the windows (15 of them) for $15,000. This included replacing a door with a window door, filling one window, and changing two rooms with two small windows into a single large window in each room. This made a HUGE difference - the house is incredibly bright now.
We also replaced all the appliances, furnace, water heater, and changed from steel to copper piping throughout the house. We're about to redo the bathroom and kitchen and stucco. The house was in major disrepair, and many of the things we've done were safety issues - the windows, for example, were nearly rotted out and wouldn't open.
If you're in our area I'd be happy to pass along the names of people we've worked with. I would highly recommend our window people, and the plumbers were so awful that I'd hate for anyone else to use them!