Plumbing business - SBA/Other financing

Close to having a plumbing business under LOI. Owner is only willing to roll around 10% but is willing to carry the license for the next two years. My understanding is for an SBA loan it is likely required for him to roll 20% and also guarantee 20% of the loan. Is this correct. Has anyone else dealt with this? Have a small add-on behind it working on as well to get to approximately $700k of SDE with needing to hire a GM to replace owners.