Not everyone will need a truly unique door for their home. Some just need a nice practical door that will keep their household stay and warm during the harshest settings. This isn’t a hard thing to accomplish nowadays with the latest advancements in home design. If one is willing to look around, they will be able to find all of the doors that they need at a price that fits even the most modest budget.
Exterior doors to fit this purpose are easy to find. All you really need is a solid wood door that shows some basic resistance to the elements. In fact, the cheaper doors usually offer more protection since they tend to be a thicker and tougher door than their decorative alternatives. I will say that one should never think about being too cheap about the exterior door. The cost in heat loss and general damage will cost a lot more than that decent door.
Interior doors definitely offer a lot of practical options. Security and natural elements aren’t really a concern. You just need to have a solid piece of wood separating the rooms for privacy and air control. This means that you don’t have to worry much about the design, except to make sure that it at least goes with the basic look of the other wood in your house. Other than that, just look for options at your local home store. Don’t forget about local auctions though. Any big home being remodeled will usually toss out a bunch of doors that can go for low prices. Keep an eye out for such an option when you’re planning any changes to your doors.