Think about your money situation, like your credit score, how much you can put down at the start, your debts vs your income, and how steady your money flow is.

Advice NeededTLDR - Spend an additional $30k now to upgrade the sewer system on-site while the contractor is already mobilized or go with a sewer injection pump which is likely a viable solution the will last for years with proper maintenance. 

Particularly buying properties to rent out for additional cash flow but also flipping properties.

Inspect well as Miami is notorious for illegal and non-permitted additions.  

Then once your up and running if you have the opportunity to build additional units do so once you know the business.

10) Make sure all of the above, and more, are compliant with Fair Housing requirements, Fair Credit Reporting Act, Federal privacy laws, etc?

We are in Salt Lake City, and It's only our basement that is rented, should we move and rent our upstairs as a long term lease it should bring in an additional $1800, bringing our rents to $3,750 and cash flow to roughly $800-$1,000 monthly.

Someone recently suggested that I used a person (unknown to me but referred) to use their credit to help be refinance.

Additionally, nothing can be enforced without a system to challenge the enforcement. 

also are they available for purchase under LLC with individual credit and acceptable DTI?