If you want to buy a good budget projector, you should consider the following factors.
Brightness
If you want to pick a budget projector, the brightness is the first thing you should consider before making a decision. If the projector has low brightness, you can just use it in a completely dark environment. If you want to use it during the daytime, a projector with high brightness is preferred.
Resolution
When the projector is bright enough, you should pay attention to the resolution. Generally, a budget home projector should have at least 480P. Most projectors under $100 have a resolution of 720P.
Keystone
The keystone effect refers to the trapezoidal image caused by improper placement and positioning angles. If the projector has a keystone correction feature, the image adjustment is quick and convenient. However, if the projector lacks a keystone correction feature, the image adjustment may be annoying.
Screen
As most budget projectors are poor in terms of images, a screen may be necessary. You can refer to the projector screen buying guide to choose a good projector.
There are hundreds of budget projectors on the market. If you are tired of picking a proper one, you can search for the best projector under 100 or the best projector under $200 and pick one on the list.