Should we have a joint bank account separate from our own strictly for the REI business to keep track of funds and cash flow recycling and etc?

Dogs and cats pee on laminate, hot-water humidifiers leak on it, kids start wet-mopping it when they spill something on it that they don't want Mommy to see, tenants turn off the heat when they go somewhere no matter what you write into the lease, and the stuff swells at the joints.

Our plan was to pay off our loans as fast as we can, start a corporation to mitigate risk and start a joint savings account where we do 50/50 contributions to build up cash to invest. 

Our activities for 2016 consisted of two joint ventures.  

Are they asking 800 a month for instance and location is same, superior, or inferior?

I would recommend reaching out to them to see about doing some kind of joint venture.

Here's a little backstory 1 yr and some couple of months ago, I was at the Joint Base Lewis–McChord library in Washington State.

You put them all on one lease and make sure it holds them jointly and severably liable.

If you owned the house for 2 out of the last 5 years and lived in it in 2 of the last 5 years, and your profit did not exceed 250K (if single) or 500K (if married filing jointly), you will not pay capital gain tax.  

Our offer is either as a consultant, or we can look at a joint venture.