portable projectors

There are many review sites. (https://www.google.com/search?client=firefox-b-1-d&q=portable+projector). This community is not a review site and it would be difficult to make a recommendation without knowing your detailed requirements.

Be cautious when reading reviews; many are paid for and do not accurately reflect product quality or performance.

Besides "light room" some additional important issues are:

how far (n feet away) does it need to throw its picture?

what size screen or wall is the target at that distance? (wall requires more brightness than a screen)

would you be better served by a large display, or having your clients provide a large-screen TV, such as in a conference room?

Moving pictures or charts?