Boring newbie help topic

Lasers can be awesome!

I, however, have a boring need as a newbie here. I am looking for a line laser that has certain capabilities and I hope that this knowledgeable community can help.

My needs:

1) class II, green laser, 532nm,
2) between 1 to 5mW (the boring part),
3) can project a line and dotted line (lens filter?),
4) can run for hours continuously,
5) projected line needs to be 10-12ft in length,
6) the laser needs to be about 2-7ft away from center of line,
7) affordable

I am willing and even interested in possibly using component parts to learn and save money, but not necessary.

Use is for similar to a horizontal line laser used in leveling for construction projects (boring again), but I don't need the leveling function. And it will be pointed at an angle towards the ground. I also intend for it to be used outside and still considered safe. I really have to experiment with 1mW vs 5mW when used in different lighting conditions, but there it is.

I found something kinda/sorta similar here, but too much $ for my needs -
https://www.laserglow.com/BLG#

Thanks.