This violates the lease, but rent is paid on time each month, neighbors have not noticed anything unusual, and the tenants are hardly ever there so overall, they are good tenants to have.I am debating ending the lease due to the clear violation, OR adding the new employees to the lease for a fee with regular inspection to ensure only 3 people are staying in the unit. 

Use more than you sold as your new rental and  live in one unit as your new primary. 

Is it a commercial (5+ units) property?

This strategy can generate quick profits but requires a good understanding of renovation costs and market trends.House Hacking:Live in one unit of a multi-unit property while renting out the others.

Hey Andrew, leveraging your existing financial strengths and experience in pooling resources for investment like commercial syndication, you could consider building a diversified real estate portfolio focused on out-of-state single-family homes in growing markets or smaller multi-family units like duplexes or triplexes.

This would provide a long-term assistance remedy for you as well.In the meantime, contact 211 United Way of Georgia to find mortgage assistance or utility assistance, for temporary help.

Conventional will mainly be 75% for 1 unit and 70% on 2-4 units. 

Or the 4 unit multi's etc.  

Is this true and does that mean as a new investor I should stay away from those units?

Depending on the cost of living in your local market and availability to 2-4 unit properties, house-hacking may be a strategy worth exploring.All the best!