1950年代のコロニアルに追加して再構成します

We have a 1953 colonial "fixer-upper" in a charming neighborhood and would like to reconfigure the existing space and add space for large, more open, kitchen/dining/family area. The house is on 1/3 of an acre. It is pretty typical for its time - 8' ceilings, small bathrooms, laundry in the basement, limited insulation, etc. There is a pool which we like although the cement surround is cracking in places and not very attractive. The current house has OK bones but needs a lot of work. The exterior needs new and improved trim, new windows and new siding plus a paint job. When we moved in we refinished the existing oak floors, ripped out carpet from the upstairs and stairway and finished the oak floors to match downstairs. We painted and did some other work to make it livable. Our budget is about $150k but this wouldn't include the cost of the kitchen or the new master bathroom or powder room fixtures and finishes.

Add between 200 and 400 sqf. both downstairs and upstairs. Downstairs this would include a more open, modern kitchen/dining/living area. In addition, the hall from alongside the kitchen to a small exterior covered porch needs to be changed along with the small powder room coming off of it. Ideally that area would somehow be opened up - the hall could go all the way into the garage for instance, and somehow a mud room and larger bathroom could perhaps be created.

Upstairs this would include at a minimum an expanded master bath and master closets. Perhaps an additional bedroom could be added to take the house from 3 to 4 bedrooms.

Outside we would like to enhance the trim, change out the windows as ours are rotting, change the siding and paint. We are interested in options for what to do with the concrete pool surround. Paint it? Remove it?

I am more interested in 2D than 3D drawings at this time.

We are not as concerned with finishes, colors, materials, etc. now as I have a pretty good idea of what I like in those areas. We are very concerned with getting the overall layout right and doing the best job we can with our budget as I don't have any building expertise to know what's possible.