I live in Red Bank and grew up in Fair Haven. 

If they are VERY professional, they will have their processes in writing as verification that it is enforced equally and fairly by their entire staff.6.

Her rent is $1500/month and I pay Arian’s $2100 with the mortgage and maintainence.  

I would like to do fair by the owner, but my profit margin comes first!!!!

If you sell you will loose quite a bit in agent fees and you might never buy again in a prime location like Mountain View, You seem fairly young and have long investment horizon, if you are able to hold on to this long term you will most likely reap the benefits like its doing for @Maria D.   

@BOB CRANEY Here's a link to MD Fair Housing: https://mccr.maryland.gov/Pages/Housing-Discrimina...Familial status is a protected class, so even asking if the applicants are married could land you in a world of trouble.I think @Marc Winter's idea of "jointly and severally" language makes sense, but I'd check with a local attorney to be sure.

The only thing I can offer would be my time, I can help if your doing a rehab (moving things, construction, maintaining, etc.)

 There are many different ways to create a business model I would definitely make sure I understand all the laws and regulations such as fair housing discrimination fair credit reporting act and local property code before you go down this path you may be creating a lot of extra work in a lot of potential lawsuits and litigation if you’re not versed on the laws that protect tenants  I would just ask yourself what the goal of the reason you’re doing that is if it’s to save a little bit money or not deal with an incompetent property management company then you may want to change companies before you go through all of this work just as a side bar of what you’re trying to do

I need something that is well maintained already and occupied. 

Real estate commission will be reduced due to my wife being a realtor.I am trying to figure out a fair deal for the owner of the lots whether it be a flat % return, a partnership split, or another type of agreement.