AAXA - M8 UST Projector (MP-800-UST)

It should run all day just fine since it is a DLP model. If you are happy with the M8 standard throw, then I would imagine that this model will make you happy as well. You will have a good idea of how bright the image will be and what it will generally look like.

I bought and highly recommend the aaxa m8 Short Throw Projector. The picture is amazing. The fan is a bit noisy but if you have a sound system the noise is fine. You can find it for under $600. I have had it for a few weeks and love it

4K? No. 1080p.. close. I'd say the AAXA M8 is probably the best sub $500 laser projector you can get. Its only 1080p native, but has 3 lasers not 1, and can support 4K downscaling to 1080p which looks damn good. It's not super bright but plenty bright for a 100" to 120" screen in a dark room. Slightly more is their M8 UST model, which is similar in specs. If 4K is your game, you'll jumping to $1K or so or more.

I purchased the Aaxa M8 Ultra Short Throw projector about 3 months ago and use it almost every day. While not mini, it is a very small and portable machine. Amazon has refurbished ones that come up all the time for about $400. We took it to the cabin within weeks of getting it and it travels well. Quick to set up and once you are familiar with the keystone, it is easy to have a 16:9 picture that is quite bright, especially in a dark room. It is bright enough that last night my daughter and I watched an entire movie with no issues with a table lamp on less than 5 feet from the projector. No issues with it being blurry, but this is not a high-end machine - it is by far the cheapest UST on the market - so there are some sacrifices (UI, remote, speakers, you'll want a streaming stick as well), but overall, I really enjoy it.