LLC startup questions

[Terry Royce]

I am looking to startup two LLC's. One for my investment partner and I to purchase and hold rentals. And one for myself to wholesale properties, and maybe own a few individual properties.

My questions are, what is the best way to set up the LLC for taxation purposes? I've read you can have it taxed as a C corp, but would this be beneficial for my purposes, and how do you go about this.

Do I need an operating agreement for the LLC that only I am in?

Can an operating agreement be altered after the LLC is set up?

How much can I expect to pay for an attorney to draft up the documents necessary?

Thanks in advance for all help.