It seems that almost everyone's dream home is a new home that looks old. That either does not exist or does not come cheap. Old homes were built with labor intensive methods that just aren't used any more and that look can be nearly impossible to get within most budgets. You either get modern style or pay through the nose. I would suggest you forget that goal or forget getting a new house.
I have not built a house myself but have long thought about it. My parents did so while I was growing up. Their main problems:
- A neighbor wanted to buy a portion of their land just before building. That took a long time to get the land properly divided.
- Know your style. If two people bicker over every small detail, it will be very tedious.
- Know how to inspect things yourself and inspect it regularly. Are walls straight? Is the plumbing actually welded or just dry-fit? Are the outlets where you actually want or are they installed in an impossible to reach location? Do pieces fit once parts of the design are all included (like the garage door rails going right through your staircase?
- Watch for thieves and vandals while the house is unprotected.
- It'll take far longer than you hope and want.
I'd add my personal thoughts:
- Lights in the perimeter of the room, not the center. This avoids every single thing having glare and shadows at the same time. More lights than you think you need. In every room.
- Lights around your mirrors not above, you don't want to look hideous every time you look at the mirror.
- Add empty pipes to every room. First society added electricity, then phones, then cable, then ethernet. We don't know what is next. It is quite cheap to have a spare pathway for later without needing to tear down walls.
- Bigger garage. Then bigger than that. Multiple single garage doors rather than one double door so that you have room to open the car doors. Taller garage doors than you currently need.
- Don't skimp on the roof or anything that protects your house from the elements, especially water.
- Check the angle of the driveway before building. Can you safely shovel snow and ice off of it?
- Thicker walls and better insulation than is required.
- Every protrusion out of the house is a radiator to your heating/cooling bills (in a bad way) and an attractant for bugs/water. No one wants a perfect cube, but try to think before you have every-single thing jutting out.
- If it is multiple stories, one AC unit per story. Avoid the hassle of a hot upstairs and a cold downstairs.
- Ceiling fans everywhere. Every bedroom/office. In the living room or at least the kitchen.
- Don't put the smoke detectors in the path of the airflow from your kitchen.
- One more bathroom than you think you need.
- Wider doors than normal, if you expect to live there for a long time. It'll come in handy as you age.