People, put the cash towards something useful, like a couple of movies. A light meter won't tell you what you like so its pointless IMHO, one person will find a given light output too bright and another too dim, its all subjective so forget about measurements.
I have owned calibration gear for more than 15 years and NEVER bother with light measurements, the picture either looks right or its doesn't, I don't need a light meter to tell me.
30ftl is Standard Dynamic Range by the book, it's what 1080 Bluray disks are mastered for. On a big screen 30ftl can look too bright, with standard SDR gamma, for some people because the image fills far more of your vision than a TV and you are viewing in the dark, but others may think it's too dim and want brighter.
Only slight gamma correction is needed for SDR at 30ftl or more on a projector. HDR, on the other hand, will be WAY, WAY, WAY to dark if standard HDR gamma is used because HDR is mastered for 10 to 40 times higher output than what the projector is capable of so the projector MUST dramatically "tone map" gamma for HDR video to get an acceptable picture at a MUCH lower peak output than the video was mastered for. How well this is done is critical for the on screen image, but don't fool your selves into thinking what you are seeing is in any way "HDR", it's not. The same result or better can be achieved with SDR video because the studio engineers mastered the SDR video for 30ftl and can do a far more accurate job than any "tone mapping" algorithm in any projector, be it dynamic or static.
Dynamic HDR tone mapping is an attempt at a solution for a problem that should not exist, and doesn't with SDR video.