@Rob L. I'm not sure of any other way, I'm sure people could chime in and offer their two cents but if you're doing two to three separate properties a year with different investors, it just makes sense to create an LLC for each, although maybe a bit more expensive. Just the right way to do things. Don't do each one through a lawyer, maybe the first one to get an understanding but the creation of an LLC is pretty straight forward, simple. They upcharge for free services like applying for an EIN number. I got a few quotes from lawyers in MA and each was over $1100.00 including the state filing fee.
After some research, about 5 minutes of my time instead of paying $1100.00 I paid $603.00 through setting up through mycorporation. The most important thing is the operating agreement here. Again, I would sit down with a lawyer just for the Operating Agreement pay a little bit, as it's the most important piece of paper in a Multi-Member LLC, get a firm understanding of the language and that's it. From there on out, make your own and never be charged for it again.
Good luck. I'll be interested to see if anyone else chimes in here but from what I understand, this is the best, safest way to do things. What's a few hundred bucks extra if your making thousands.